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CVE-2025-8178: Critical Heap-based Buffer Overflow Vulnerability in Tenda AC10

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Overview

Recent cybersecurity findings have revealed a critical vulnerability, classified as CVE-2025-8178, impacting Tenda AC10 routers. This vulnerability lies in an unidentified function of the /goform/RequestsProcessLaid file, where argument manipulation can lead to a heap-based buffer overflow. As Tenda AC10 routers are commonly used in both residential and commercial settings, this vulnerability has significant implications. If exploited, it can potentially compromise systems or lead to significant data leakage.

Vulnerability Summary

CVE ID: CVE-2025-8178
Severity: Critical (8.8 CVSS Score)
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage

Affected Products

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Product | Affected Versions

Tenda AC10 | 16.03.10.13

How the Exploit Works

The vulnerability exploits a flaw in the argument processing of the /goform/RequestsProcessLaid function of the Tenda AC10 router. Specifically, the manipulation of the argument ‘device1D’ results in a heap-based buffer overflow. This type of overflow happens when more data is written into a block of memory, or buffer, than it is designed to hold. Attackers can then overwrite adjacent memory locations, potentially leading to arbitrary code execution, system crashes, or data leakage.

Conceptual Example Code

The following is a conceptual example of how the vulnerability might be exploited. This is a hypothetical HTTP POST request that provides an overly long ‘device1D’ argument, leading to buffer overflow:

POST /goform/RequestsProcessLaid HTTP/1.1
Host: target_router_IP
Content-Type: application/x-www-form-urlencoded
device1D=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...[continue until buffer overflow]

Note: The ‘A’ character is commonly used in demonstrating buffer overflows as it is easy to spot in memory dumps.

Mitigation Guidance

Users are advised to apply the vendor’s patch to fix the vulnerability as soon as possible. If the patch cannot be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation. These security measures can help monitor network traffic and block any suspicious activities that may exploit the vulnerability.

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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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