{"id":54340,"date":"2025-06-23T07:24:15","date_gmt":"2025-06-23T07:24:15","guid":{"rendered":""},"modified":"2025-10-04T00:32:23","modified_gmt":"2025-10-04T06:32:23","slug":"cve-2025-6163-critical-buffer-overflow-vulnerability-in-totolink-a3002ru","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6163-critical-buffer-overflow-vulnerability-in-totolink-a3002ru\/","title":{"rendered":"CVE-2025-6163: Critical Buffer Overflow Vulnerability in TOTOLINK A3002RU<\/strong>"},"content":{"rendered":"

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

A critical vulnerability has been identified in the TOTOLINK A3002RU wireless router version 3.0.0-B20230809.1615. This vulnerability, designated as CVE-2025-6163, enables attackers to manipulate a specific argument in HTTP POST requests, leading to buffer overflow. This issue poses a significant threat as it may be exploited remotely, potentially compromising systems<\/a> or leading to data leakage.
\nThe importance of mitigating this vulnerability cannot be overstated, given its critical rating and the widespread use of TOTOLINK<\/a> routers. The exploit has already been disclosed to the public, increasing the urgency to implement preventative measures.<\/p>\n

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

CVE ID: CVE-2025-6163
\nSeverity: Critical, CVSS v3.1 score: 8.8
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system<\/a> compromise or data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

TOTOLINK A3002RU | 3.0.0-B20230809.1615<\/p>\n

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

The vulnerability lies within the HTTP POST Request<\/a> Handler, specifically in the file \/boafrm\/formMultiAP. An attacker can manipulate the ‘submit-url’ argument in a HTTP POST request, causing a buffer overflow<\/a>. Buffer overflow<\/a> occurs when data written to a buffer exceeds its capacity, causing it to overwrite adjacent memory. This consequence can lead to erratic program behavior, system crashes, or the execution of malicious code<\/a>.<\/p>\n

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

Below is a conceptual example of how the vulnerability might be exploited in an HTTP request<\/a>:<\/p>\n

POST \/boafrm\/formMultiAP HTTP\/1.1\nHost: target.totolink.net\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=[MALICIOUS_PAYLOAD]<\/code><\/pre>\n
In this hypothetical example, [MALICIOUS_PAYLOAD] would be replaced with an exploit designed to cause a buffer overflow<\/a>.<\/p>\n
Mitigation and Prevention<\/strong><\/p>\n
There are two recommended mitigations for this vulnerability<\/a>. The first, and most effective, is to apply the vendor patch once available. If a patch is not immediately available or there are constraints in applying it, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation.
\nIt’s also recommended to disable remote management of the TOTOLINK<\/a> A3002RU router if not necessary, as the exploit can be launched remotely.
\nAs always, users are encouraged to monitor their systems for any unusual activity and ensure that all software<\/a> is kept up-to-date.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A critical vulnerability has been identified in the TOTOLINK A3002RU wireless router version 3.0.0-B20230809.1615. This vulnerability, designated as CVE-2025-6163, enables attackers to manipulate a specific argument in HTTP POST requests, leading to buffer overflow. This issue poses a significant threat as it may be exploited remotely, potentially compromising systems or leading to data leakage. […]<\/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-54340","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