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CVE-2025-6110: Critical Buffer Overflow Vulnerability in Tenda FH1201 1.2.0.14(408)

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Overview

CVE-2025-6110 is a critical vulnerability found in Tenda FH1201 1.2.0.14(408), a widely-used router firmware. This vulnerability, identified in an unknown component of the file /goform/SafeMacFilter, can lead to a stack-based buffer overflow. The exploit can be initiated remotely, putting countless systems at risk of unauthorized access, compromise, or data leakage. Given the widespread use of Tenda FH1201, the impact of this vulnerability is far-reaching and presents a significant risk to both individual and corporate users.

Vulnerability Summary

CVE ID: CVE-2025-6110
Severity: Critical (CVSS: 8.8)
Attack Vector: Remote Network
Privileges Required: None
User Interaction: None
Impact: System Compromise and Potential Data Leakage

Affected Products

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Product | Affected Versions

Tenda FH1201 | 1.2.0.14(408)

How the Exploit Works

The vulnerability is triggered by manipulating the ‘page‘ argument in the /goform/SafeMacFilter file. This manipulation can cause the system to overflow the buffer, a common programming error where more data is written into a block of memory, or buffer, than it can hold. In this case, the overflow can corrupt relevant memory and potentially allow an attacker to execute arbitrary code or cause a denial of service (DoS).

Conceptual Example Code

Here is a conceptual example of a malicious HTTP POST request that could exploit this vulnerability:

POST /goform/SafeMacFilter HTTP/1.1
Host: target_router_IP
Content-Type: application/x-www-form-urlencoded
page=%s%s%s%s%s... [overly long string]

In this example, the attacker sends a request to the /goform/SafeMacFilter endpoint with a manipulated ‘page’ argument. The ‘page’ argument contains a string that is longer than the buffer can handle, causing a buffer overflow.

Mitigation

The best way to mitigate this vulnerability is to apply the patch provided by the vendor as soon as it becomes available. As a temporary measure, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help detect and block attempts to exploit this vulnerability. Regularly updating and patching your systems can also reduce the risk of being affected by such vulnerabilities.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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