{"id":34254,"date":"2025-05-02T19:46:56","date_gmt":"2025-05-02T19:46:56","guid":{"rendered":""},"modified":"2025-09-29T02:50:25","modified_gmt":"2025-09-29T08:50:25","slug":"cve-2025-3990-critical-buffer-overflow-vulnerability-in-totolink-n150rt","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-3990-critical-buffer-overflow-vulnerability-in-totolink-n150rt\/","title":{"rendered":"CVE-2025-3990: Critical Buffer Overflow Vulnerability in TOTOLINK N150RT<\/strong>"},"content":{"rendered":"

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

A critical security vulnerability identified as CVE-2025-3990 has been discovered in TOTOLINK’s N150RT router, specifically affecting version 3.4.0-B20190525. This vulnerability is of significant concern due to the potential for remote exploitation, leading to system compromise or data leakage. The issue lies within an unknown functionality of the file \/boafrm\/formVlan, which can be manipulated via the argument “submit-url” to trigger a buffer overflow<\/a> condition. Given that the exploit details for this vulnerability<\/a> have been publicly disclosed, the risk of exploitation is considerably high.<\/p>\n

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

CVE ID: CVE-2025-3990
\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 N150RT<\/a> | 3.4.0-B20190525<\/p>\n

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

The vulnerability exists due to insufficient boundary checks within the file<\/a> \/boafrm\/formVlan. An attacker can manipulate the “submit-url” argument to cause a buffer overflow<\/a> condition. This overflow can lead to unauthorized access to the system or potential data<\/a> leakage. Given that the vulnerability can be exploited remotely<\/a>, it opens up the possibility for attackers to compromise systems without needing physical access or user interaction.<\/p>\n

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

Below is a conceptual example of how an HTTP request exploiting this vulnerability<\/a> might look. Note that actual exploit code would contain specific payload designed to cause the buffer overflow<\/a>.<\/p>\n

POST \/boafrm\/formVlan HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=<\/code><\/pre>\n
The `` would be crafted to exceed the buffer size, causing an overflow. The specifics of this payload would depend on the exact nature of the buffer overflow vulnerability<\/a>.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
Users of affected versions are advised to apply the vendor-supplied patch as soon as possible to mitigate this vulnerability<\/a>. In the event that a patch cannot be applied immediately, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation measure. These systems can be set up to detect and block attempts to exploit this vulnerability<\/a>. However, they should not be considered as a long-term solution, as they may not be able to fully prevent a sophisticated attack. The ultimate solution<\/a> is to patch the affected systems promptly.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A critical security vulnerability identified as CVE-2025-3990 has been discovered in TOTOLINK’s N150RT router, specifically affecting version 3.4.0-B20190525. This vulnerability is of significant concern due to the potential for remote exploitation, leading to system compromise or data leakage. The issue lies within an unknown functionality of the file \/boafrm\/formVlan, which can be manipulated via […]<\/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-34254","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