Author: Ameeba

Overview

A critical vulnerability, identified as CVE-2025-7532, has been discovered in Tenda FH1202 1.2.0.14(408). This vulnerability affects a crucial function within the device’s firmware potentially compromising system security and leading to data leakage. Given the severity of the vulnerability, it has been rated as critical and holds a high CVSS score of 8.8. This vulnerability poses a significant risk to individuals or organizations using the affected Tenda product, as it can lead to unauthorized access, system compromise, and data leakage.

Vulnerability Summary

CVE ID: CVE-2025-7532
Severity: Critical (CVSS: 8.8)
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage

Affected Products

Product | Affected Versions

Tenda FH1202 | 1.2.0.14(408)

How the Exploit Works

The vulnerability lies within the function fromwebExcptypemanFilter of the file /goform/webExcptypemanFilter. It is a stack-based buffer overflow vulnerability that can be exploited by manipulating the ‘page’ argument. An attacker can initiate the attack remotely by sending a specially crafted request to the vulnerable function. If successful, this can lead to arbitrary code execution, allowing the attacker to gain unauthorized access to the system and potentially lead to data leakage.

Conceptual Example Code

Here is a conceptual example of how the vulnerability might be exploited. This is not a real exploit code, but a representation of how an attacker might craft a malicious request to exploit the vulnerability.

GET /goform/webExcptypemanFilter?page= [insert malicious payload here] HTTP/1.1
Host: target.example.com

Mitigation Guidance

Until a patch is available from the vendor, it is recommended to use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as a temporary mitigation measure. Both these systems can help detect and prevent the exploitation of the vulnerability by monitoring network traffic and blocking suspicious activities. However, these are temporary solutions and can only minimize the risk, not eliminate it entirely. Therefore, it is crucial to apply the vendor-provided patch as soon as it becomes available.

Overview

The Common Vulnerabilities and Exposures (CVE) system has identified a critical stack-based buffer overflow vulnerability, designated as CVE-2025-7530, in Tenda FH1202 version 1.2.0.14(408). This vulnerability exposes systems to potential compromise and data leakage, posing a significant risk to users. The flaw resides in the fromPptpUserAdd function of the /goform/PPTPDClient file, and the manipulation of the Username argument can trigger it. Given the severity of the impact and the fact that the exploit has been publicized, immediate action is required from users and administrators of affected systems.

Vulnerability Summary

CVE ID: CVE-2025-7530
Severity: Critical (8.8 CVSS Severity Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

Tenda FH1202 | 1.2.0.14(408)

How the Exploit Works

The vulnerability resides in the fromPptpUserAdd function of the /goform/PPTPDClient file within the Tenda FH1202 firmware. A remote attacker can exploit this vulnerability by sending specially crafted data that manipulates the Username argument within this function. As the Username argument is not properly validated, this input results in a stack-based buffer overflow condition. This overflow can allow the attacker to execute arbitrary code, leading to full system compromise or data leakage.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited. This is a pseudo HTTP POST request to the vulnerable endpoint, carrying a malicious payload that manipulates the Username argument to trigger the buffer overflow:

POST /goform/PPTPDClient?fromPptpUserAdd HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
username=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...&password=guest123

In this example, ‘A’ is repeated multiple times to overflow the username buffer. This is a simplified example and actual exploitation would require crafting a payload that leads to arbitrary code execution.

Mitigation Guidance

Users and administrators are strongly encouraged to apply the vendor-provided patch to mitigate this vulnerability immediately. If a patch cannot be applied immediately, implementing a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can provide temporary mitigation. These solutions can help detect and block exploitation attempts. It’s also recommended to restrict access to the vulnerable system until the patch is applied to reduce the risk of exploitation.

Overview

The cybersecurity landscape is constantly evolving with new vulnerabilities being discovered daily. One such critical vulnerability has been found in the Tenda FH1202 1.2.0.14(408) router model, specifically within the /goform/GstDhcpSetSer file. This vulnerability is considered critical due to its potential for remote code execution, which could lead to system compromise or data leakage. The router’s wide usage in both home and business environments underlines the severity of this vulnerability and its potential for widespread damage.

Vulnerability Summary

CVE ID: CVE-2025-7528
Severity: Critical, CVSS Severity 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 FH1202 | 1.2.0.14(408)

How the Exploit Works

The vulnerability lies in the function fromGstDhcpSetSer of the file /goform/GstDhcpSetSer. The manipulation of the argument ‘dips’ leads to a stack-based buffer overflow. This overflow can result in the execution of arbitrary code due to the corruption of critical data structures. As it is possible to launch the exploit remotely, an attacker can compromise the system without requiring any user interaction.

Conceptual Example Code

A conceptual example demonstrating the exploitation of this vulnerability could look like this:

POST /goform/GstDhcpSetSer HTTP/1.1
Host: target_router_ip
Content-Type: application/x-www-form-urlencoded
dips=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...

In the above example, the ‘dips’ argument is manipulated with a long string of ‘A’s causing a buffer overflow.

Mitigation

Tenda has released a patch to address this vulnerability. Users are strongly urged to update their devices to the latest firmware version as soon as possible. For temporary mitigation, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used to detect and prevent attempts to exploit this vulnerability. However, these are not long-term solutions, and the device’s firmware should be updated as soon as feasible.

Overview

A recently discovered vulnerability, CVE-2025-7505, has been classified as critical, affecting Tenda FH451 1.0.0.9 devices. This vulnerability exists within the HTTP POST Request Handler, specifically the frmL7ProtForm function of the file /goform/L7Prot. The flaw can lead to a stack-based buffer overflow, which can potentially result in system compromise or data leakage. This vulnerability is of high importance as it can be exploited remotely, and the exploit details have been disclosed to the public.

Vulnerability Summary

CVE ID: CVE-2025-7505
Severity: Critical; CVSS v3 Score: 8.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential for system compromise and data leakage

Affected Products

Product | Affected Versions

Tenda FH451 | 1.0.0.9

How the Exploit Works

The vulnerability stems from the manipulation of the ‘page’ argument in the HTTP POST request handler. This manipulation triggers a stack-based buffer overflow condition. Buffer overflow situations are dangerous because they can overwrite memory values, leading to arbitrary code execution. In this case, the threat actor can potentially gain control of the system or access sensitive data.

Conceptual Example Code

Here’s a conceptual example of how the vulnerability might be exploited:

POST /goform/L7Prot HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
page=<malicious_payload>

In the example above, a threat actor sends a malicious payload as the ‘page’ argument in a POST request to the vulnerable /goform/L7Prot endpoint. The “ would typically be designed to cause a buffer overflow, which could lead to system compromise or data leakage.

Remediation

The most effective remediation for this vulnerability is to apply the vendor’s patch. This patch should address the buffer overflow vulnerability and prevent any potential exploits. In the absence of a patch, or as a temporary measure, organizations can consider implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to identify and block attempts to exploit this vulnerability.

Overview

A newly identified vulnerability, dubbed CVE-2025-7468, poses a significant threat to users of Tenda FH1201 version 1.2.0.14. This vulnerability is especially concerning due to its critical severity and the potential for remote exploitation. The vulnerability resides in the HTTP POST Request Handler component, specifically affecting the function fromSafeUrlFilter. What makes this vulnerability particularly alarming is the fact that the exploit has already been made public, thereby increasing the risk and potential for malicious exploitation.

Vulnerability Summary

CVE ID: CVE-2025-7468
Severity: Critical (8.8 CVSS Score)
Attack Vector: Remote
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

Tenda FH1201 | 1.2.0.14

How the Exploit Works

The vulnerability operates through the manipulation of the ‘page’ argument in the fromSafeUrlFilter function. This manipulation can lead to a buffer overflow condition. Buffer overflow conditions are dangerous because they can allow an attacker to overwrite data in memory, potentially leading to arbitrary code execution. In this case, the attacker can remotely send a specially crafted HTTP POST request targeting the vulnerable function, leading to system compromise or data leakage.

Conceptual Example Code

Here’s a conceptual example demonstrating how an attacker might exploit this vulnerability. This does not contain actual exploit code but is intended to illustrate the nature of the vulnerability.
“`http
POST /goform/fromSafeUrlFilter HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
page=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA