{"id":51998,"date":"2025-06-14T21:59:02","date_gmt":"2025-06-14T21:59:02","guid":{"rendered":""},"modified":"2025-11-03T21:09:30","modified_gmt":"2025-11-04T03:09:30","slug":"cve-2025-5861-critical-buffer-overflow-vulnerability-in-tenda-ac7-15-03-06-44","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-5861-critical-buffer-overflow-vulnerability-in-tenda-ac7-15-03-06-44\/","title":{"rendered":"CVE-2025-5861: Critical Buffer Overflow Vulnerability in Tenda AC7 15.03.06.44<\/strong>"},"content":{"rendered":"

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

A critical vulnerability identified as CVE-2025-5861 has been discovered in Tenda AC7 15.03.06.44. This vulnerability specifically affects the function fromadvsetlanip of the file \/goform\/AdvSetLanip. It matters because the vulnerability, which arises from the manipulation of the argument lanMask, leads to a buffer overflow<\/a>. This can potentially compromise the system<\/a> or cause data leakage. Furthermore, the exploit can be initiated remotely<\/a> and has already been disclosed to the public, which increases the likelihood of its misuse.<\/p>\n

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

CVE ID: CVE-2025-5861
\nSeverity: Critical, CVSS 8.8
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise or data leakage<\/a><\/p>\n

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

Product | Affected Versions<\/p>\n

Tenda AC7<\/a> | 15.03.06.44<\/p>\n

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

The exploit works by manipulating the argument lanMask that is part of the fromadvsetlanip function in the \/goform\/AdvSetLanip file. This manipulation leads to a buffer overflow<\/a>, which in computing terms means that more data is put into a buffer than it can handle. This overflow can overwrite adjacent memory locations, potentially leading<\/a> to erratic program behavior, system crashes, or a breach of system security.<\/p>\n

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

Here is a conceptual example of how the vulnerability might be exploited:<\/p>\n

POST \/goform\/AdvSetLanip HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"lanMask\": \"256.256.256.256\" } \/\/ This is an invalid IP address used to trigger buffer overflow<\/code><\/pre>\n
In this example, an invalid IP address is used as the lanMask argument to trigger the buffer overflow<\/a>. It’s important to note that this is a simplified representation and the real-world exploit might require more complex manipulation.<\/p>\n
Mitigation and Remediation<\/strong><\/p>\n
The best way to mitigate this vulnerability is to apply the vendor patch<\/a>. If the patch is not available or cannot be applied immediately, a temporary mitigation could be to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to monitor traffic and block any suspicious activity related to this exploit<\/a>. Regularly updating and patching your systems and software is a good general practice to reduce the risk of such vulnerabilities<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A critical vulnerability identified as CVE-2025-5861 has been discovered in Tenda AC7 15.03.06.44. This vulnerability specifically affects the function fromadvsetlanip of the file \/goform\/AdvSetLanip. It matters because the vulnerability, which arises from the manipulation of the argument lanMask, leads to a buffer overflow. This can potentially compromise the system or cause data leakage. Furthermore, […]<\/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":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[86],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-51998","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow"],"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