{"id":55719,"date":"2025-06-28T07:20:51","date_gmt":"2025-06-28T07:20:51","guid":{"rendered":""},"modified":"2025-10-15T16:37:18","modified_gmt":"2025-10-15T22:37:18","slug":"cve-2025-6399-critical-buffer-overflow-vulnerability-in-totolink-x15","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6399-critical-buffer-overflow-vulnerability-in-totolink-x15\/","title":{"rendered":"CVE-2025-6399: Critical Buffer Overflow Vulnerability in TOTOLINK X15<\/strong>"},"content":{"rendered":"

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

A critical vulnerability has been discovered in the TOTOLINK X15 1.0.0-B20230714.1105 router, which, if exploited, could lead to system compromise and potential data leakage. The vulnerability resides in an unknown function of the file \/boafrm\/formIPv6Addr, which is a part of the HTTP POST Request Handler component. Due to the lack of proper input validation, a malicious actor can manipulate the argument ‘submit-url’ leading to a buffer overflow<\/a> condition. Given the high severity of this vulnerability<\/a>, it is crucial for system administrators and users of the affected device to understand the threat and take the necessary mitigation steps.<\/p>\n

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

CVE ID: CVE-2025-6399
\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 X15<\/a> | 1.0.0-B20230714.1105<\/p>\n

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

The vulnerability exists due to inadequate input<\/a> validation in the HTTP POST Request Handler component’s \/boafrm\/formIPv6Addr file. When a specially crafted POST request is sent with a manipulated ‘submit-url’ argument, it can cause a buffer overflow<\/a> condition. This buffer overflow can potentially allow the attacker to execute arbitrary code<\/a>, leading to full system compromise or data leakage. The exploit can be triggered remotely and does not require any user<\/a> interaction or privileges.<\/p>\n

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

Here’s a conceptual example of how the vulnerability might be exploited. This is a sample HTTP POST request<\/a>:<\/p>\n

POST \/boafrm\/formIPv6Addr HTTP\/1.1\nHost: vulnerable.totolink.com\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=<\/code><\/pre>\n
In this request, “ is the manipulated variable that triggers the buffer overflow<\/a> condition. This payload could consist of a specially crafted string that exceeds the buffer limit, possibly containing malicious code intended to be executed<\/a> upon successful exploitation.<\/p>\n
Mitigation<\/strong><\/p>\n
Users of the affected TOTOLINK X15 router are strongly advised to apply the vendor-provided patch as soon as possible to mitigate this vulnerability<\/a>. If the patch cannot be applied immediately, users should consider deploying a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary measure to detect and block attempts to exploit this vulnerability<\/a>. Always ensure to follow good security practices, such as regularly updating systems and monitoring network<\/a> traffic for suspicious activities.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A critical vulnerability has been discovered in the TOTOLINK X15 1.0.0-B20230714.1105 router, which, if exploited, could lead to system compromise and potential data leakage. The vulnerability resides in an unknown function of the file \/boafrm\/formIPv6Addr, which is a part of the HTTP POST Request Handler component. Due to the lack of proper input validation, […]<\/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-55719","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