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CVE-2025-57528: Denial of Service Vulnerability in Tenda AC6 US_AC6V1.0BR_V15.03.05.16_multi_TD01

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Overview

A serious vulnerability, CVE-2025-57528, has been discovered in Tenda AC6 US_AC6V1.0BR_V15.03.05.16_multi_TD01. This vulnerability can allow attackers to cause a denial of service to the system, potentially leading to system compromise or data leakage. This issue poses a significant threat to the integrity and availability of systems running the affected software.

Vulnerability Summary

CVE ID: CVE-2025-57528
Severity: High (CVSS: 7.7)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise, data leakage, and denial of service

Affected Products

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Product | Affected Versions

Tenda AC6 | US_AC6V1.0BR_V15.03.05.16_multi_TD01

How the Exploit Works

The vulnerability lies in the formSetCfm function of the Tenda AC6 router software. The function improperly handles input given via the funcname, funcpara1, and funcpara2 parameters. If an attacker can manipulate these parameters with malicious input, they can cause a denial of service to the system.

Conceptual Example Code

The conceptual example below demonstrates how an attacker might exploit this vulnerability using an HTTP request:

POST /SetCfm HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
funcname=<malicious_input>&funcpara1=<malicious_input>&funcpara2=<malicious_input>

In this example, `` would be replaced with the attacker’s crafted data designed to exploit the vulnerability and cause a denial of service.

Mitigation

Users are urged to apply the vendor patch as soon as possible to mitigate this vulnerability. In the interim, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary protection.

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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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