{"id":57287,"date":"2025-07-05T01:28:35","date_gmt":"2025-07-05T01:28:35","guid":{"rendered":""},"modified":"2025-09-03T19:03:41","modified_gmt":"2025-09-04T01:03:41","slug":"cve-2025-6825-critical-buffer-overflow-vulnerability-in-totolink-a702r","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6825-critical-buffer-overflow-vulnerability-in-totolink-a702r\/","title":{"rendered":"CVE-2025-6825: Critical Buffer Overflow Vulnerability in TOTOLINK A702R<\/strong>"},"content":{"rendered":"

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

A critical vulnerability, identified as CVE-2025-6825, has been discovered in TOTOLINK A702R routers up to version 4.0.0-B20230721.1521. This flaw lies within an unspecified functionality of the file \/boafrm\/formWlSiteSurvey, which is part of the HTTP POST Request Handler component. The vulnerability is of significant concern as it can be exploited remotely and may compromise the entire system<\/a> or result in data leakage. Given the widespread use of TOTOLINK routers, the potential impact of this vulnerability<\/a> is immense and demands immediate attention.<\/p>\n

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

CVE ID: CVE-2025-6825
\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 A702R<\/a> | Up to version 4.0.0-B20230721.1521<\/p>\n

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

The exploit targets the argument ‘submit-url’ in the HTTP POST Request<\/a> Handler component of the router’s firmware. By sending a specially crafted request, an attacker can manipulate this argument to trigger a buffer overflow<\/a>. This overflow can subsequently lead to system instability, unauthorized access, or even remote command execution<\/a>. The potential for remote exploitation coupled with the absence of any user interaction makes this a particularly dangerous vulnerability<\/a>.<\/p>\n

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

An attacker might exploit this vulnerability with a malicious HTTP POST request<\/a> similar to the following:<\/p>\n

POST \/boafrm\/formWlSiteSurvey HTTP\/1.1\nHost: vulnerable.router.com\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=<\/code><\/pre>\n
In this example, `` would be a string designed to overflow the buffer associated with the ‘submit-url’ argument, potentially leading<\/a> to unexpected behavior or unauthorized access.<\/p>\n
Remediation<\/strong><\/p>\n
As a mitigation measure, users are advised to apply the vendor’s patch as soon as it becomes available. In the meantime, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can provide temporary mitigation against potential attacks exploiting this vulnerability<\/a>. However, it is critical to note that these are temporary solutions and cannot fully eliminate the risks associated with this vulnerability<\/a>. Regular patching and system updates remain the most effective defense against such threats<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A critical vulnerability, identified as CVE-2025-6825, has been discovered in TOTOLINK A702R routers up to version 4.0.0-B20230721.1521. This flaw lies within an unspecified functionality of the file \/boafrm\/formWlSiteSurvey, which is part of the HTTP POST Request Handler component. The vulnerability is of significant concern as it can be exploited remotely and may compromise the […]<\/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-57287","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