Author: Ameeba

Overview

A critical vulnerability has been discovered in the formSetPPTPUserList function of the file /goform/setPptpUserList in Tenda AC6 15.03.05.16. This vulnerability has been given the identification CVE-2025-5852 and poses a significant threat to user data and system integrity. This vulnerability matters due to the severity of its potential impact; it can be exploited remotely and could potentially lead to system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-5852
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

Tenda AC6 | 15.03.05.16

How the Exploit Works

The vulnerability exploits a buffer overflow condition in the formSetPPTPUserList function of the file /goform/setPptpUserList. The manipulation of the argument list can cause the system to write data beyond the intended boundary of a fixed-length buffer. This can corrupt data, crash the system, or lead to the execution of malicious code.

Conceptual Example Code

The following is a conceptual example that demonstrates how the vulnerability might be exploited. This example should not be used for malicious purposes.

POST /goform/setPptpUserList HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "user_list": "A"*10000 }

In the example above, the user_list argument is filled with a large number of ‘A’ characters, which could overflow the buffer and lead to unexpected behavior, such as the execution of malicious code.

Mitigation

To mitigate this vulnerability, users are recommended to apply the vendor patch as soon as it becomes available. In the interim, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. Regularly updating and patching systems can help prevent exploitation of such vulnerabilities.

Overview

CVE-2025-5851 is a critical vulnerability that has been discovered in Tenda AC15 15.03.05.19_multi. This vulnerability is potentially devastating as it allows for a buffer overflow attack, which could lead to system compromise or data leakage. Given that the exploit has been publicly disclosed, it is of utmost importance that affected systems apply the necessary patches or mitigation measures to protect against this vulnerability.
This vulnerability not only affects individual users but also poses a significant threat to organizations using the Tenda AC15 15.03.05.19_multi. The risk of a successful exploit can lead to unauthorized access, alteration, or even deletion of data, which could have devastating consequences for businesses.

Vulnerability Summary

CVE ID: CVE-2025-5851
Severity: Critical (8.8/10 on 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

The vulnerability is found in the HTTP POST Request Handler component of the Tenda AC15 15.03.05.19_multi, specifically in the function fromadvsetlanip of the file /goform/AdvSetLanip. The manipulation of the argument lanMask leads to a buffer overflow. This means that an attacker can send a specially crafted HTTP POST request, which exceeds the expected data size, to overflow the buffer and execute arbitrary code or crash the system.

Conceptual Example Code

Here is a conceptual example of how an attacker might exploit this vulnerability using a malicious HTTP POST request:

POST /goform/AdvSetLanip HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
lanMask=255.255.255.0&lanIp=192.168.0.1&lanMask=AAAA...[long string of A's to overflow buffer]

The above example demonstrates a long string of “A” characters used to overflow the buffer. This is a typical method used in buffer overflow attacks. Please note that this is a simplified representation and actual exploit code would likely involve more complex manipulations.

Mitigation and Patching

Given the severity of this vulnerability, it is recommended that users apply the vendor patch as soon as possible. If the patch cannot be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation.
Regularly updating and patching systems, as well as monitoring network traffic for unusual activity, can also help to prevent successful exploits of this vulnerability.

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.

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

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