{"id":54072,"date":"2025-06-22T18:18:27","date_gmt":"2025-06-22T18:18:27","guid":{"rendered":""},"modified":"2025-10-14T23:20:18","modified_gmt":"2025-10-15T05:20:18","slug":"cve-2025-6147-critical-buffer-overflow-vulnerability-in-totolink-a702r-router","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6147-critical-buffer-overflow-vulnerability-in-totolink-a702r-router\/","title":{"rendered":"CVE-2025-6147: Critical Buffer Overflow Vulnerability in TOTOLINK A702R Router<\/strong>"},"content":{"rendered":"

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

In the constantly evolving field of cybersecurity, new vulnerabilities are discovered regularly, posing threats to various software and hardware. The latest in this list is a critical vulnerability found in TOTOLINK A702R 4.0.0-B20230721.1521, a widely used router. This vulnerability, identified as CVE-2025-6147, affects the unknown code of the file<\/a> \/boafrm\/formSysLog in the HTTP POST Request Handler component. The significance of this vulnerability lies in its potential to allow<\/a> remote attackers to execute a buffer overflow attack, leading to system compromise and data leakage.<\/p>\n

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

CVE ID: CVE-2025-6147
\nSeverity: Critical (CVSS: 8.8)
\nAttack Vector: Remote
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system<\/a> compromise and data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

TOTOLINK A702R<\/a> | 4.0.0-B20230721.1521<\/p>\n

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

The exploit targets the HTTP POST Request Handler component in the TOTOLINK<\/a> A702R router. Specifically, it affects an unknown part of the code in the \/boafrm\/formSysLog file<\/a>. The vulnerability is triggered when the ‘submit-url’ argument is manipulated, leading to a buffer overflow<\/a>. This flaw allows an attacker to remotely overflow the buffer<\/a> with arbitrary data, which can potentially lead to arbitrary code execution, thereby compromising the system and potentially leading to data leaks.<\/p>\n

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

Below is a conceptual example of how the vulnerability might be exploited. In this case, a malicious HTTP POST request is sent to the target, with a manipulated ‘submit-url’ argument in the request body, causing a buffer overflow<\/a>.<\/p>\n

POST \/boafrm\/formSysLog HTTP\/1.1\nHost: target.totolink.com\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=http:\/\/%s\/%s&%s=<\/code><\/pre>\n
Mitigation and Prevention<\/strong><\/p>\n
As the vulnerability has been publicly<\/a> disclosed, it is essential to apply mitigation strategies promptly. The official vendor has released a patch to address this vulnerability<\/a>. Users are strongly encouraged to apply this patch as soon as possible to their TOTOLINK A702R<\/a> routers.
\nIn addition to applying the vendor patch, users can use Web<\/a> Application Firewalls (WAF) or Intrusion Detection Systems (IDS) as temporary mitigation measures. These systems can help detect and block malicious traffic that attempts to exploit this vulnerability<\/a>.
\nTo conclude, the discovery of the CVE-2025-6147 vulnerability underscores the importance of regular patch management<\/a> and the use of security tools like WAF and IDS to enhance the overall security posture of your systems and networks.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview In the constantly evolving field of cybersecurity, new vulnerabilities are discovered regularly, posing threats to various software and hardware. The latest in this list is a critical vulnerability found in TOTOLINK A702R 4.0.0-B20230721.1521, a widely used router. This vulnerability, identified as CVE-2025-6147, affects the unknown code of the file \/boafrm\/formSysLog in the HTTP POST […]<\/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":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-54072","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-rce"],"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