{"id":55775,"date":"2025-06-28T13:23:04","date_gmt":"2025-06-28T13:23:04","guid":{"rendered":""},"modified":"2025-08-28T23:06:20","modified_gmt":"2025-08-29T05:06:20","slug":"cve-2025-6487-critical-buffer-overflow-vulnerability-in-totolink-a3002r","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6487-critical-buffer-overflow-vulnerability-in-totolink-a3002r\/","title":{"rendered":"CVE-2025-6487: Critical Buffer Overflow Vulnerability in TOTOLINK A3002R<\/strong>"},"content":{"rendered":"

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

CVE-2025-6487 is a critical vulnerability found in TOTOLINK A3002R 1.1.1-B20200824.0128 that could allow malicious users to potentially compromise the system or cause data leakage. The vulnerability affects the function formRoute of the file \/boafrm\/formRoute. Cybersecurity professionals, network administrators, and users of this product should pay close attention to this vulnerability<\/a> due to its high severity and the fact that it can be exploited remotely.<\/p>\n

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

CVE ID: CVE-2025-6487
\nSeverity: Critical, CVSS Score 8.8
\nAttack Vector: Remote
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Possible system compromise and data<\/a> leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

TOTOLINK A3002R | 1.1.1-B20200824.0128<\/p>\n

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

The vulnerability lies in the handling<\/a> of the ‘subnet’ argument in the function formRoute of the file \/boafrm\/formRoute. An unchecked manipulation of the ‘subnet’ argument can lead to a stack-based buffer overflow<\/a>. A buffer overflow<\/a> occurs when the volume of data exceeds the storage capacity of the buffer, causing the extra information to overflow into adjacent buffers. In this case, an attacker can exploit this vulnerability by sending a specially crafted request with a manipulated ‘subnet’ argument, causing the buffer to overflow<\/a> and enabling the execution of arbitrary code.<\/p>\n

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

The following is a conceptual example of how the vulnerability might be exploited. This is a simplified representation and the actual attack would require a specifically crafted malicious payload.<\/p>\n

POST \/boafrm\/formRoute HTTP\/1.1\nHost: target-router-ip\nContent-Type: application\/x-www-form-urlencoded\nsubnet=255.255.255.0&overflowing_data=AAAAAAAAAAAAAAAA...<\/code><\/pre>\n
In the above example, an excessively long value is used for the ‘overflowing_data’ parameter, causing the buffer to overflow<\/a> and potentially allowing the execution of the ‘overflowing_data’ as code.<\/p>\n
Mitigations<\/strong><\/p>\n
To mitigate this vulnerability<\/a>, users are advised to apply the vendor-supplied patch as soon as possible. In the meantime, or in cases where applying the patch is not immediately possible, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) may be used as temporary mitigations. These systems should be configured to detect and block attempts to exploit this vulnerability<\/a> by monitoring for unusual or excessively long ‘subnet’ argument values.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview CVE-2025-6487 is a critical vulnerability found in TOTOLINK A3002R 1.1.1-B20200824.0128 that could allow malicious users to potentially compromise the system or cause data leakage. The vulnerability affects the function formRoute of the file \/boafrm\/formRoute. Cybersecurity professionals, network administrators, and users of this product should pay close attention to this vulnerability due to its high […]<\/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-55775","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