{"id":43695,"date":"2025-05-24T06:25:48","date_gmt":"2025-05-24T06:25:48","guid":{"rendered":""},"modified":"2025-09-11T05:38:12","modified_gmt":"2025-09-11T11:38:12","slug":"cve-2025-4833-critical-buffer-overflow-vulnerability-in-totolink-routers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4833-critical-buffer-overflow-vulnerability-in-totolink-routers\/","title":{"rendered":"CVE-2025-4833: Critical Buffer Overflow Vulnerability in TOTOLINK Routers<\/strong>"},"content":{"rendered":"

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

A critical vulnerability has been discovered in specific TOTOLINK router models, specifically the A702R, A3002R, and A3002RU versions 3.0.0-B20230809.1615. This particular bug allows for remote code execution, potentially leading to a complete system compromise or data leakage. This issue lies in the unknown processing of the file \/boafrm\/formNtp and its HTTP POST<\/a> request handler component. Given the severity of this vulnerability<\/a>, it’s essential for organizations and individuals using the affected models to understand the potential risks and take immediate steps to mitigate them.<\/p>\n

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

CVE ID: CVE-2025-4833
\nSeverity: Critical (CVSS: 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 A702R<\/a> | 3.0.0-B20230809.1615
\nTOTOLINK A3002R<\/a> | 3.0.0-B20230809.1615
\nTOTOLINK A3002RU | 3.0.0-B20230809.1615<\/p>\n

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

The vulnerability exists due to improper input validation<\/a> within the HTTP POST request handler of these router models. Attackers exploit this by manipulating the ‘submit-url’ argument to trigger a buffer overflow<\/a>. This can potentially allow for arbitrary code<\/a> execution.<\/p>\n

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

A conceptual example of the vulnerability might look like this:<\/p>\n

POST \/boafrm\/formNtp HTTP\/1.1\nHost: target-router-ip\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=[BUFFER OVERFLOW PAYLOAD]<\/code><\/pre>\n
In the above example, the attacker would replace “[BUFFER OVERFLOW PAYLOAD] with a specially crafted string designed to exploit the buffer overflow vulnerability<\/a>.<\/p>\n
Mitigation and Recommendations<\/strong><\/p>\n
To protect against this vulnerability<\/a>, users of the affected TOTOLINK routers are strongly advised to apply the vendor patch as soon as it becomes available. In the meantime, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation against potential exploitation. It’s also recommended to restrict network access to the affected devices and closely monitor<\/a> network traffic for any signs of suspicious activity.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A critical vulnerability has been discovered in specific TOTOLINK router models, specifically the A702R, A3002R, and A3002RU versions 3.0.0-B20230809.1615. This particular bug allows for remote code execution, potentially leading to a complete system compromise or data leakage. This issue lies in the unknown processing of the file \/boafrm\/formNtp and its HTTP POST request handler […]<\/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-43695","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