Author: Ameeba

CVE-2025-5850: Critical Remote Buffer Overflow Vulnerability in Tenda AC15
Overview

A critical vulnerability, termed as CVE-2025-5850, has been identified in Tenda AC15 version 15.03.05.19_multi. This vulnerability, upon successful exploitation, has the potential to compromise the entire system and may result in sensitive data leakage. Given the severity of the issue and the high CVSS score, it is pivotal for all users of the affected system to apply the necessary patches and secure their systems. This article provides a comprehensive analysis of this vulnerability, its potential impact, and the steps that can be taken for mitigation.

Vulnerability Summary

CVE ID: CVE-2025-5850
Severity: Critical (8.8 CVSS Severity Score)
Attack Vector: Remote
Privileges Required: Low
User Interaction: Required
Impact: Potential system compromise and data leakage

Affected Products

Product | Affected Versions

Tenda AC15 | 15.03.05.19_multi

How the Exploit Works

The vulnerability originates from the improper handling of the ‘Time’ argument within the ‘formsetschedled’ function in the ‘/goform/SetLEDCf’ file. A malicious actor can manipulate this argument to trigger a buffer overflow condition. This overflow condition can be exploited to execute arbitrary code on the system or even potentially gain full control of the system. Moreover, this attack can be initiated remotely, which exponentially increases the risk factor.

Conceptual Example Code

Here’s a conceptual example that demonstrates how a malicious HTTP POST request might be used to exploit this vulnerability. Please note that this is a simplified example and actual exploit code may vary significantly.
```
POST /goform/SetLEDCf HTTP/1.1
Host: target.IP.address
Content-Type: application/x-www-form-urlencoded
Time=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...
```
In this example, the ‘Time’ parameter is filled with a long string of ‘A’ characters, causing the buffer to overflow and potentially allowing the execution of arbitrary code.

Mitigation

The best course of action is to apply the vendor patch to patch the vulnerability as soon as possible. However, if you’re unable to apply the patch immediately, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can provide temporary mitigation. These systems can detect and block malicious requests, thereby preventing the exploitation of the vulnerability.
June 14, 2025
CVE-2025-5849: Critical Buffer Overflow Vulnerability in Tenda AC15
Overview

The cybersecurity landscape is constantly evolving with new threats continually emerging. One of these threats is a critical vulnerability identified as CVE-2025-5849. This vulnerability affects the popular Tenda AC15 15.03.05.19_multi router. The flaw lies in the function formSetSafeWanWebMan of the file /goform/SetRemoteWebCfg of the HTTP POST Request Handler.
This vulnerability matters because it can lead to a stack-based buffer overflow, potentially resulting in system compromise or data leakage. Since it’s possible to initiate the attack remotely and the exploit is already public, the risk for users is significant.

Vulnerability Summary

CVE ID: CVE-2025-5849
Severity: Critical (8.8 CVSS)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

Tenda AC15 | 15.03.05.19_multi

How the Exploit Works

This vulnerability stems from improper validation of user-supplied data, which can lead to a stack-based buffer overflow. The problem occurs when the remoteIp argument is manipulated in the HTTP POST Request Handler. This could allow an attacker to overwrite the allocated buffer, leading to the execution of arbitrary code, or even cause the system to crash, resulting in a denial of service.

Conceptual Example Code

Here’s a conceptual example of how this vulnerability might be exploited. This is a simple HTTP POST request with manipulated remoteIp argument:
```
POST /goform/SetRemoteWebCfg HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
remoteIp=192.168.1.1%00[insert malicious code here]
```
In this example, the IP address has been followed by a null byte (%00), effectively terminating the string. The malicious code following the null byte could then overflow the buffer.

Mitigation

The best way to mitigate this vulnerability is by applying the patch provided by the vendor. If the patch can’t be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. It is also advisable to limit access to the vulnerable system to trusted networks and hosts.
Ultimately, staying updated with the latest security patches and maintaining a robust security infrastructure are key to minimizing the risk of such vulnerabilities.
June 14, 2025
CVE-2025-5848: Critical Buffer Overflow Vulnerability in Tenda AC15 15.03.05.19_multi
Overview

The vulnerability identified as CVE-2025-5848 represents a significant threat to the security of networks that employ Tenda AC15 15.03.05.19_multi. This vulnerability, categorized as critical, exposes the networks to potential compromise, data leakage, or even full system takeover. The vulnerability is exploited through a buffer overflow attack vector on the function formSetPPTPUserList of the file /goform/setPptpUserList, which can be manipulated remotely.

Vulnerability Summary

CVE ID: CVE-2025-5848
Severity: Critical (CVSS Score: 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

Tenda AC15 | 15.03.05.19_multi

How the Exploit Works

The vulnerability CVE-2025-5848 is a result of improper input validation in the function formSetPPTPUserList of the file /goform/setPptpUserList. The component HTTP POST Request Handler is affected by this issue. Attackers manipulate the argument list, leading to a buffer overflow. In essence, the attacker sends more data than the buffer can handle, causing it to overflow and overwrite other memory locations. This can lead to erratic application behavior or even execution of arbitrary code.

Conceptual Example Code

An attacker might exploit this vulnerability by sending a malicious HTTP POST request like the following:
```
POST /goform/setPptpUserList HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
username=legitimate_user&password=legitimate_password&list=OVERFLOW_DATA
```
In the above example, `OVERFLOW_DATA` represents an excessively large amount of data designed to overflow the buffer.

Mitigation

The best course of action to mitigate this vulnerability is to apply the vendor’s patch as soon as it is available. In the interim, the use of a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can provide temporary mitigation against potential exploits. Also, it is advisable to limit the exposure of the vulnerable system to the internet and restrict access to trusted networks only.
June 14, 2025
CVE-2025-5847: Critical Buffer Overflow Vulnerability in Tenda AC9 Router
Overview

A serious vulnerability has been discovered in the Tenda AC9 router (version 15.03.02.13), which, if exploited, could lead to a system compromise or data leakage. This vulnerability was found in the HTTP POST Request Handler component, specifically in the formSetSafeWanWebMan function of the /goform/SetRemoteWebCfg file. The vulnerability is particularly concerning because it can be exploited remotely, meaning that attackers do not have to be physically present or connected to the same network as the router. Therefore, it is of paramount importance for users of the Tenda AC9 router to understand the implications of this vulnerability and take immediate steps to mitigate the risk.

Vulnerability Summary

CVE ID: CVE-2025-5847
Severity: Critical (8.8 CVSS score)
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

Tenda AC9 Router | 15.03.02.13

How the Exploit Works

The vulnerability stems from a stack-based buffer overflow that occurs when the remoteIp argument in the HTTP POST Request Handler is manipulated. By sending a specially crafted HTTP POST request, an attacker can overflow the buffer, leading to unexpected behavior from the router. This behavior could range from causing the router to crash to allowing the execution of arbitrary code, providing the attacker with unauthorized access to the system or data.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited. This is a sample HTTP POST request:
```
POST /goform/SetRemoteWebCfg HTTP/1.1
Host: vulnerable.router
Content-Type: application/x-www-form-urlencoded
remoteIp=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...
```
In this example, the `remoteIp` value is filled with an excessive number of ‘A’ characters, causing a buffer overflow. This is a simplified example, and actual exploitation would likely involve a more complex payload designed to take advantage of the overflow to execute arbitrary code.
Please note that this code is provided for educational purposes only; attempting to exploit vulnerabilities without permission is illegal and unethical.

Mitigation Guidance

Users of the affected Tenda AC9 router are strongly advised to apply the vendor-provided patch to fix this vulnerability as soon as it is available. In the interim, a web application firewall (WAF) or intrusion detection system (IDS) can provide temporary mitigation against potential exploits.
June 14, 2025
CVE-2025-5839: Critical Buffer Overflow Vulnerability in Tenda AC9 15.03.02.13
Overview

A critical vulnerability, classified as CVE-2025-5839, has been identified in Tenda AC9 version 15.03.02.13, a popular router used by many businesses and individuals alike. This vulnerability lies within the POST Request Handler component of the router’s software, specifically, the fromadvsetlanip function of the /goform/AdvSetLanip file. This vulnerability matters because it allows an attacker to remotely manipulate the lanMask argument, causing a buffer overflow, which can potentially lead to system compromise or data leakage. The exploit is public, increasing the risk of its exploitation.

Vulnerability Summary

CVE ID: CVE-2025-5839
Severity: Critical (CVSS score 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

Tenda AC9 | 15.03.02.13

How the Exploit Works

The exploit works by an attacker sending a specially crafted HTTP POST request to the /goform/AdvSetLanip endpoint of the router’s web interface. This request manipulates the lanMask argument, which is not properly validated by the fromadvsetlanip function. This manipulation causes a buffer overflow in the system, which can potentially lead to arbitrary code execution or data leakage.

Conceptual Example Code
```
POST /goform/AdvSetLanip HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
lanMask=255.255.255.0%00{malicious_code_here}
```
In this conceptual example, the malicious code follows a null byte (%00), which is often used to indicate the end of a string in C/C++. If the malicious code is executed, it could compromise the system or cause data leakage.

Protection and Mitigation

The best mitigation strategy for this vulnerability is to apply the patch provided by the vendor as soon as it becomes available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation by detecting and blocking malicious traffic. However, these measures are not foolproof, as sophisticated attackers may be able to bypass them. Therefore, applying the vendor’s patch should be a top priority.
June 14, 2025
CVE-2025-47601: Privilege Escalation Vulnerability in Christiaan Pieterse MaxiBlocks
Overview

The cybersecurity landscape is constantly evolving with new vulnerabilities being discovered regularly. One such vulnerability, identified as CVE-2025-47601, is a severe security flaw affecting Christiaan Pieterse’s MaxiBlocks software. The issue lies in a missing authorization vulnerability that could potentially lead to privilege escalation, thus, posing a significant threat to all users.
This vulnerability is of paramount concern as it compromises the integrity and confidentiality of the system, leading to potential data leakage or even full system compromise. Given the severity of this vulnerability, understanding its nuances and mitigating it promptly is vital for all users of MaxiBlocks.

Vulnerability Summary

CVE ID: CVE-2025-47601
Severity: High (8.8 CVSS Score)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Privilege Escalation, Potential system compromise, and data leakage

Affected Products

Product | Affected Versions

Christiaan Pieterse MaxiBlocks | Up to 2.1.0

How the Exploit Works

The exploit works by exploiting a missing authorization check within the MaxiBlocks software. An attacker can send specially crafted network packets to the vulnerable system and manipulate the MaxiBlocks’ functions without needing proper authorization. This allows the attacker to escalate their privileges, giving them unauthorized access to system resources and potentially control over the entire system.

Conceptual Example Code

Here’s a conceptual example of how the vulnerability might be exploited:
```
POST /MaxiBlocks/authorization HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"user": "attacker",
"privilege": "admin"
}
```
In the above example, an attacker sends a POST request to the MaxiBlocks authorization endpoint, attempting to set their user privilege to “admin” without providing proper authorization.

Mitigation

The most effective way to mitigate this vulnerability is by applying the patch provided by the vendor. In addition, utilizing a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as a temporary mitigation method until the patch can be applied. Regular vulnerability scanning and patch management are also recommended to prevent future exploitation of vulnerabilities.
June 14, 2025
CVE-2025-5799: Critical Buffer Overflow Vulnerability in Tenda AC8 16.03.34.09

Overview

The cybersecurity community has recently identified a critical vulnerability, designated as CVE-2025-5799, in the Tenda AC8 16.03.34.09. This vulnerability has a significant impact on the function fromSetWirelessRepeat of the file /goform/WifiExtraSet. It is a stack-based buffer overflow vulnerability that can be exploited remotely, potentially leading to system compromise or data leakage. Given the widespread use of Tenda routers, this vulnerability poses a significant risk to both individual users and organizations.

Vulnerability Summary

CVE ID: CVE-2025-5799
Severity: Critical (8.8 CVSS)
Attack Vector: Remote
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

Tenda AC8 | 16.03.34.09

How the Exploit Works

The vulnerability arises from the manipulation of the argument wpapsk_crypto. A buffer overflow occurs when the size of the data exceeds the buffer’s capacity, resulting in corruption of valid data. In this case, the attacker can overflow the stack buffer by sending an overly long wpapsk_crypto argument. This can allow the attacker to overwrite the function return address, thereby gaining control over the execution flow of the program. The attacker can then execute arbitrary code and potentially gain unauthorized access to the system.

Conceptual Example Code

The following is a conceptual example of how the vulnerability might be exploited. In this case, an HTTP POST request sends an overly long wpapsk_crypto argument to the /goform/WifiExtraSet endpoint, causing a buffer overflow.
“`http
POST /goform/WifiExtraSet HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
“wpapsk_crypto”: “aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

June 14, 2025
CVE-2025-5798: Critical Remote Stack-Based Buffer Overflow Vulnerability in Tenda AC8
Overview

A critical vulnerability has been identified in Tenda AC8 routers, specifically version 16.03.34.09. This vulnerability, referenced as CVE-2025-5798, allows remote attackers to exploit a stack-based buffer overflow in the SetSysTimeCfg function. This vulnerability can lead to serious consequences such as a full system compromise or data leakage, making it a significant security concern for any individual or organization utilizing the Tenda AC8. Immediate action is required to mitigate the risk.

Vulnerability Summary

CVE ID: CVE-2025-5798
Severity: Critical (CVSS 8.8)
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage

Affected Products

Product | Affected Versions

Tenda AC8 | 16.03.34.09

How the Exploit Works

The vulnerability resides in the fromSetSysTime function of the file /goform/SetSysTimeCfg. By manipulating the timeType argument, an attacker can cause a stack-based buffer overflow. The overflow can be used to overwrite the program’s control flow, leading to remote code execution and potentially full system compromise. The exploit can be triggered remotely without any user interaction, making it a particularly dangerous vulnerability.

Conceptual Example Code

The following conceptual example shows how the vulnerability might be exploited. The malicious payload would be crafted to overflow the buffer and manipulate the program’s control flow.
```
POST /goform/SetSysTimeCfg HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
timeType=1&timezone=<malicious_payload>
```
In this example, “ would be a specifically crafted string that causes the buffer overflow and leads to remote code execution. This is just a hypothetical example to illustrate the nature of the vulnerability. Actual exploit code may be significantly more complex and could depend on the specific system configuration.

Mitigation

Users of Tenda AC8 version 16.03.34.09 are advised to apply the patch provided by the vendor as soon as possible. As a temporary mitigation, users may also employ a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to detect and block exploit attempts. However, these measures will not fix the underlying vulnerability and are only intended as a stopgap until the patch can be applied.
June 14, 2025
CVE-2025-49013: Code Injection Vulnerability in WilderForge Projects Due to Unsafe GitHub Actions Usage
Overview

This post is centered on a critical vulnerability, indexed as CVE-2025-49013, that has been discovered in several projects within the WilderForge organization. The vulnerability arises due to the unsafe use of `${{ github.event.review.body }}` and other user-controlled variables directly within shell script contexts in GitHub Actions workflows. The vulnerability concerns developers who maintain or contribute to various repositories within the WilderForge organization, and those who fork these repositories and reuse the affected GitHub Actions workflows. A successful exploit could lead to arbitrary command execution, potentially compromising CI infrastructure, secrets, and build outputs.

Vulnerability Summary

CVE ID: CVE-2025-49013
Severity: Critical (CVSS score: 9.9)
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise and data leakage

Affected Products

Product | Affected Versions

WilderForge/WilderForge | All Versions
WilderForge/ExampleMod | All Versions
WilderForge/WilderWorkspace | All Versions
WilderForge/WildermythGameProvider | All Versions
WilderForge/AutoSplitter | All Versions
WilderForge/SpASM | All Versions
WilderForge/thrixlvault | All Versions
WilderForge/MassHash | All Versions
WilderForge/DLC_Disabler | All Versions

How the Exploit Works

The exploit works by submitting a maliciously crafted pull request review containing shell metacharacters or commands. This enables the attacker to execute arbitrary shell code on the GitHub Actions runner. The code is executed with the permissions of the workflow, potentially compromising the CI infrastructure, secrets, and build outputs.

Conceptual Example Code

Here is a
conceptual
example of how the vulnerability might be exploited. In this example, `<<< "shell command"` represents the malicious shell command or metacharacters injected into the pull request review.
```
POST /repos/WilderForge/WilderForge/pulls/1/reviews HTTP/1.1
Host: api.github.com
Authorization: token USER_GITHUB_TOKEN
Accept: application/vnd.github.v3+json
Content-Type: application/json
{
"body": "${{ github.event.review.body }} <<< \"shell command\"",
"event": "APPROVE"
}
```
This request would submit an approving review for the specified pull request, and if processed by an affected GitHub Actions workflow, would execute the attacker’s arbitrary shell command.
June 14, 2025
CVE-2025-5795: Critical Remote Buffer Overflow Vulnerability in Tenda AC5
Overview

A critical vulnerability identified as CVE-2025-5795 has been discovered, affecting the Tenda AC5 1.0/15.03.06.47 router. This vulnerability resides in the function fromadvsetlanip of the file /goform/AdvSetLanip, and it is linked to the improper handling of the lanMask argument which results in buffer overflow. Given the severity of this vulnerability, it is vital that network administrators and users of the affected product be aware and take necessary measures to mitigate the risk. This is because successful exploitation could lead to potential system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-5795
Severity: Critical (8.8 CVSS v3)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage

Affected Products

Product | Affected Versions

Tenda AC5 | 1.0/15.03.06.47

How the Exploit Works

The vulnerability stems from the improper handling of the lanMask argument in the fromadvsetlanip function of the /goform/AdvSetLanip file. An attacker can manipulate this argument to cause a buffer overflow. This can be done remotely without requiring any user interaction or privileges. Upon successful exploitation, the attacker can potentially compromise the system and leak sensitive data.

Conceptual Example Code

The following is a conceptual example of how an attacker might exploit this vulnerability via a malicious HTTP request:
```
POST /goform/AdvSetLanip HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
lanMask=256&lanIp=192.168.1.1&lanGateway=192.168.1.254
```
In this example, the attacker manipulates the lanMask argument to an invalid value, causing a buffer overflow in the system. Note that this is a simplified example and real-world attacks may involve more complexity.

Mitigation Recommendations

Users and administrators are strongly advised to apply the vendor-provided patch as soon as possible to mitigate the risk posed by this vulnerability. If a patch cannot be immediately applied, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure to detect and block attempts to exploit this vulnerability. However, these should not be seen as long-term solutions and users should apply patches as soon as they become available.
June 14, 2025