{"id":42956,"date":"2025-05-23T00:13:17","date_gmt":"2025-05-23T00:13:17","guid":{"rendered":""},"modified":"2025-09-08T20:16:39","modified_gmt":"2025-09-09T02:16:39","slug":"cve-2025-4730-buffer-overflow-vulnerability-in-totolink-routers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4730-buffer-overflow-vulnerability-in-totolink-routers\/","title":{"rendered":"CVE-2025-4730: Buffer Overflow Vulnerability in TOTOLINK Routers<\/strong>"},"content":{"rendered":"

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

A newly discovered vulnerability in TOTOLINK A3002R and A3002RU routers, identified as CVE-2025-4730, poses a serious threat to network security. This critical-rated vulnerability resides in an unknown functionality of the file \/boafrm\/formMapDel and can be exploited via an HTTP POST request. The manipulation of the argument devicemac1 leads to a buffer overflow<\/a> situation. This can potentially compromise the system or lead<\/a> to data leakage, making it a significant concern for users and network administrators of these specific TOTOLINK router models.
\nThe exploit has been publicly disclosed and is open to potential misuse<\/a>, further raising the urgency for effective mitigation. The vulnerability has been assigned a CVSS Severity<\/a> Score of 8.8, signifying its high impact and gravity.<\/p>\n

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

CVE ID: CVE-2025-4730
\nSeverity: Critical (8.8)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise or data leakage<\/a><\/p>\n

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

Product | Affected Versions<\/p>\n

TOTOLINK A3002R<\/a> | 3.0.0-B20230809.1615
\nTOTOLINK A3002RU<\/a> | 3.0.0-B20230809.1615<\/p>\n

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

The vulnerability exists due to improper input validation<\/a> in the HTTP POST Request Handler. This allows an attacker to manipulate the ‘devicemac1’ argument, leading to a buffer overflow<\/a> condition. Buffer overflow is a situation where an application stores more data in a buffer than it can hold, which can result in corruption of data, crash the application, or in severe cases, lead to code execution<\/a>. In this case, a successful exploit could result in the attacker gaining unauthorized access to the system<\/a>.<\/p>\n

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

Here’s a conceptual example of how the vulnerability might be exploited. Note that this code is purely illustrative<\/a> and is not a working exploit.<\/p>\n

POST \/boafrm\/formMapDel HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\ndevicemac1=00:11:22:33:44:55%00[Buffer overflow data]<\/code><\/pre>\n
In this example, the attacker sends a POST request to the vulnerable endpoint, with the ‘devicemac1’ parameter manipulated to cause a buffer overflow<\/a>.
\nIt’s strongly recommended to apply the vendor patch as soon as it becomes available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation against this critical vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A newly discovered vulnerability in TOTOLINK A3002R and A3002RU routers, identified as CVE-2025-4730, poses a serious threat to network security. This critical-rated vulnerability resides in an unknown functionality of the file \/boafrm\/formMapDel and can be exploited via an HTTP POST request. The manipulation of the argument devicemac1 leads to a buffer overflow situation. This […]<\/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-42956","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