{"id":33858,"date":"2025-04-30T00:02:51","date_gmt":"2025-04-30T00:02:51","guid":{"rendered":""},"modified":"2025-05-30T17:54:00","modified_gmt":"2025-05-30T23:54:00","slug":"cve-2025-3802-critical-vulnerability-in-tenda-wifi-routers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-3802-critical-vulnerability-in-tenda-wifi-routers\/","title":{"rendered":"CVE-2025-3802: Critical Vulnerability in Tenda Wifi Routers<\/strong>"},"content":{"rendered":"

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

In this post, we will delve into a critical vulnerability (CVE-2025-3802) that affects Tenda W12 and i24 routers, specifically the versions 3.0.0.4(2887) and 3.0.0.5(3644). The susceptibility was located in the function cgiPingSet of the file \/bin\/httpd. This vulnerability matters because the exploitation of this flaw can lead to a stack-based buffer overflow, which can potentially compromise the system or lead<\/a> to data leakage. Being remote, this vulnerability poses<\/a> significant risks to all Tenda W12 and i24 users worldwide.<\/p>\n

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

CVE ID: CVE-2025-3802
\nSeverity: Critical, CVSS Score – 8.8
\nAttack Vector: Network
\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

Tenda W12<\/a> | 3.0.0.4(2887) and 3.0.0.5(3644)
\nTenda i24<\/a> | 3.0.0.4(2887) and 3.0.0.5(3644)<\/p>\n

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

The vulnerability lies within the cgiPingSet function of the \/bin\/httpd file<\/a>. It is triggered by manipulating the pingIP argument that leads to a stack-based buffer overflow<\/a>. A buffer overflow<\/a> occurs when more data is written to a buffer than it can handle, causing it to overflow. This overflow can overwrite adjacent memory locations, leading to erratic program behavior<\/a>, including memory access errors, incorrect results, and crashes.
\nIn this case, the buffer overflow<\/a> can be exploited remotely without any user interaction, making it a significant threat. Successful exploitation can lead to unauthorized disclosure of information, unauthorized modification<\/a>, and even disruption of service.<\/p>\n

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

Here’s a conceptual example of a malicious HTTP request that could exploit this vulnerability<\/a>:<\/p>\n

POST \/cgi-bin\/cgiPingSet HTTP\/1.1\nHost: [target IP]\nContent-Type: application\/x-www-form-urlencoded\npingIP=192.168.0.1%00 [Additional malicious payload]<\/code><\/pre>\n
In this example, the attacker sends a POST request<\/a> to the cgiPingSet endpoint, using a manipulated pingIP argument. The address `192.168.0.1%00` is a null byte that terminates the string and is followed by the excess data (malicious payload) that causes the buffer to overflow<\/a>.<\/p>\n
Remediation<\/strong><\/p>\n
The recommended mitigation strategy is to apply the patch provided by the vendor. If not possible immediately, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can offer temporary mitigation. However, it is advised to apply the patch as soon as possible to prevent potential system<\/a> compromise or data leakage.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview In this post, we will delve into a critical vulnerability (CVE-2025-3802) that affects Tenda W12 and i24 routers, specifically the versions 3.0.0.4(2887) and 3.0.0.5(3644). The susceptibility was located in the function cgiPingSet of the file \/bin\/httpd. This vulnerability matters because the exploitation of this flaw can lead to a stack-based buffer overflow, which can […]<\/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":[103],"product":[104],"attack_vector":[86],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-33858","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-apache","product-apache-httpd","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