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CVE-2025-32010: Stack-based Buffer Overflow Vulnerability in Tenda AC6 Cloud API

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Overview

In this blog post, we delve into a critical vulnerability discovered within the Cloud API functionality of Tenda AC6 V5.0 V02.03.01.110. This vulnerability, identified as CVE-2025-32010, presents a significant security risk to numerous systems. It has the potential to do serious harm, including system compromise and data leakage. This vulnerability is particularly concerning because it can lead to arbitrary code execution when an attacker sends a specially crafted HTTP response, making it an open door for potential malicious activity.

Vulnerability Summary

CVE ID: CVE-2025-32010
Severity: High (8.1 CVSS Score)
Attack Vector: Network-based
Privileges Required: None
User Interaction: None
Impact: System Compromise or Data Leakage

Affected Products

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Product | Affected Versions

Tenda AC6 | V5.0 V02.03.01.110

How the Exploit Works

The vulnerability lies in the handling of HTTP responses by the Cloud API functionality of the Tenda AC6. When an attacker crafts a specific HTTP response and sends it to the server, it can cause a stack-based buffer overflow. This overflow can result in arbitrary code execution, which signifies that an attacker can run any command or code they want on the compromised system.

Conceptual Example Code

Here’s a conceptual example of how an attacker might exploit this vulnerability. This includes a malicious HTTP response sent to the server.

HTTP/1.1 200 OK
Date: Mon, 23 May 2025 22:38:34 GMT
Server: Apache/2.4.1 (Unix)
Content-Type: text/html
<response>
<data>
{ "exploit_code_here": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA..."}
</data>
</response>

In the above example, the exploit_code_here attribute in the data section of the response contains a long string of “A”s. If the string is long enough to overload the buffer, it could overwrite the return address on the stack, leading to arbitrary code execution.

Mitigation Measures

It is recommended that administrators immediately apply the vendor patch to fix this vulnerability. Alternatively, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as temporary mitigation measures. These tools can help detect and block potential attacks exploiting this vulnerability. However, these are stop-gap solutions, and the vendor patch should be applied as soon as possible to ensure comprehensive security.

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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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