Author: Ameeba

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.

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.

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.

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.

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

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.

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.

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.

Overview

The cybersecurity landscape is constantly evolving, and a new critical vulnerability, CVE-2025-5794, has emerged, threatening the security of devices using Tenda AC5 15.03.06.47. This vulnerability pertains to a buffer overflow in the function formSetPPTPUserList, found in the file /goform/setPptpUserList. The implications of this vulnerability are serious, given that it can be exploited remotely, potentially leading to system compromise or data leakage.
This blog post aims to shed light on the specifics of this vulnerability, its impact, and the steps necessary for mitigation. As buffer overflow vulnerabilities are a common attack vector, understanding the nature of this exploit is crucial for both cybersecurity professionals and users of the affected products.

Vulnerability Summary

CVE ID: CVE-2025-5794
Severity: Critical (8.8 CVSS Score)
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage

Affected Products

Product | Affected Versions

Tenda AC5 | 15.03.06.47

How the Exploit Works

The exploit works by manipulating the argument list in the formSetPPTPUserList function. This manipulation leads to a buffer overflow, which is a condition where more data is put into a buffer than it can handle. This causes the extra data to overflow into adjacent memory spaces, potentially overwriting other data or causing the system to crash. In this case, the buffer overflow could enable an attacker to execute arbitrary code, potentially leading to system compromise or data leakage.

Conceptual Example Code

Here is a conceptual example of how the vulnerability might be exploited, using a malicious HTTP request:

POST /goform/setPptpUserList HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
list=OVERFLOWING_DATA_HERE

In this example, the OVERFLOWING_DATA_HERE would be replaced by an excessively long string intended to overflow the buffer in the formSetPPTPUserList function.
The exact structure and content of the overflow data would depend on the specifics of the target system and the goals of the attack.

Recommended Mitigation

The best course of action to protect your systems from this vulnerability is to apply the vendor’s patch. If the patch is not yet available or cannot be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) could serve as a temporary mitigation measure. These tools can help detect and block exploit attempts, although they cannot fully eliminate the vulnerability. Regular patching and system updates should be part of your cybersecurity strategy to prevent exploitation of known vulnerabilities like CVE-2025-5794.

Overview

We are discussing a severe cybersecurity flaw that has cropped up in TOTOLINK’s EX1200T 4.1.2cu.5232_B20210713. This vulnerability, coded as CVE-2025-5793, is considered critical due to its potential to cause system compromise or data leakage, which could have disastrous consequences for affected users. As it affects an unknown function of the file /boafrm/formPortFw in the HTTP POST Request Handler component, this vulnerability is of particular concern to anyone using the affected version of TOTOLINK EX1200T.

Vulnerability Summary

CVE ID: CVE-2025-5793
Severity: Critical (CVSS 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

TOTOLINK EX1200T | 4.1.2cu.5232_B20210713

How the Exploit Works

The CVE-2025-5793 vulnerability arises from a fault in an unknown function of the file /boafrm/formPortFw in the HTTP POST Request Handler. This flaw results in a buffer overflow when the service_type argument is manipulated. An attacker could use this vulnerability to send a specially crafted HTTP POST request to the affected system, causing the buffer overflow. This can lead to potential system compromise or data leakage.

Conceptual Example Code

Here is a
conceptual
example of how an attacker might exploit the vulnerability:

POST /boafrm/formPortFw HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
service_type=OVERFLOWING_VALUE

In the above example, the attacker sends an HTTP POST request with a buffer-overflow-inducing value for the service_type argument.

Mitigation and Remediation

The most effective way to mitigate this vulnerability is by applying the patch provided by the vendor. If the patch is not immediately available or cannot be applied in a timely manner, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can offer temporary mitigation. These solutions can be configured to detect and block the specific HTTP POST requests associated with this exploit. However, it’s crucial to remember that these are temporary measures, and the vendor’s patch should be applied as soon as feasible to fully resolve the vulnerability.