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CVE-2025-60660: Stack Overflow Vulnerability in Tenda AC18

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Overview

A critical vulnerability, CVE-2025-60660, has been identified in Tenda AC18 V15.03.05.19. This vulnerability is of significant concern because it allows malicious actors to potentially compromise the system or leak data by exploiting a stack overflow in the mac parameter via the fromAdvSetMacMtuWan function. This report is intended to provide a comprehensive understanding of this vulnerability, its impact, and mitigation strategies.

Vulnerability Summary

CVE ID: CVE-2025-60660
Severity: High (7.5 CVSS score)
Attack Vector: Remote
Privileges Required: Low
User Interaction: None
Impact: Successful exploitation of the vulnerability could result in system compromise and potential data leakage.

Affected Products

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Product | Affected Versions

Tenda AC18 | V15.03.05.19

How the Exploit Works

The vulnerability exists due to insufficient bounds checking by the fromAdvSetMacMtuWan function in the Tenda AC18 firmware. An attacker can send a specially crafted request with a too-large mac parameter, causing a stack overflow. This can lead to memory corruption, giving the attacker the ability to execute arbitrary code or disrupt the service, potentially leading to system compromise or data leakage.

Conceptual Example Code

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

POST /fromAdvSetMacMtuWan HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "mac": "A1:B2:C3:D4:E5:F6" + "A" * 5000 } // Overflows the stack

In this example, the “mac” parameter value is excessively long, enough to overflow the stack buffer allocated for it.

Mitigation Guidance

To mitigate this vulnerability, it is recommended to apply the patch provided by the vendor at the earliest. Until the patch can be applied, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to block or alert on suspicious activity can serve as a temporary mitigation strategy. It is always advised to regularly update and patch all systems, software, and firmware to protect against the latest known vulnerabilities and threats.

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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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