{"id":86564,"date":"2026-02-27T09:24:26","date_gmt":"2026-02-27T09:24:26","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-50260-buffer-overflow-vulnerability-in-tenda-ac6","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-50260-buffer-overflow-vulnerability-in-tenda-ac6\/","title":{"rendered":"CVE-2025-50260: Buffer Overflow Vulnerability in Tenda AC6<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The Tenda AC6 v15.03.05.16_multi version is susceptible to a buffer overflow vulnerability in the formSetFirewallCfg function. This vulnerability, identified as CVE-2025-50260, poses serious security risks to users and businesses utilizing these products due to the potential for system compromise and data leakage.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-50260
\nSeverity: High (CVSS 7.5)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system compromise or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Tenda AC6 | v15.03.05.16_multi<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit works by overloading the buffer of the formSetFirewallCfg function through the firewallEn parameter. The attacker sends more data than the buffer can handle, causing it to overflow. This overflow can lead to arbitrary code execution, allowing the attacker to gain control over the system.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Below is a conceptual example of how an attacker might exploit this vulnerability. Please note that this example is for illustrative purposes only.<\/p>\n

POST \/formSetFirewallCfg HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nfirewallEn=aAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...<\/code><\/pre>\n
In this example, the attacker sends a POST request with an excessively long string of “A” characters as the firewallEn parameter, causing the buffer to overflow.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
To mitigate this vulnerability, users are advised to apply the vendor’s patch once it is available. In the interim, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The Tenda AC6 v15.03.05.16_multi version is susceptible to a buffer overflow vulnerability in the formSetFirewallCfg function. This vulnerability, identified as CVE-2025-50260, poses serious security risks to users and businesses utilizing these products due to the potential for system compromise and data leakage. Vulnerability Summary CVE ID: CVE-2025-50260 Severity: High (CVSS 7.5) Attack Vector: Network […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-86564","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t