{"id":29636,"date":"2025-04-23T08:52:33","date_gmt":"2025-04-23T08:52:33","guid":{"rendered":""},"modified":"2025-09-27T02:05:18","modified_gmt":"2025-09-27T08:05:18","slug":"cve-2025-3693-critical-stack-based-buffer-overflow-in-tenda-w12-3-0-0-5","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-3693-critical-stack-based-buffer-overflow-in-tenda-w12-3-0-0-5\/","title":{"rendered":"CVE-2025-3693: Critical Stack-Based Buffer Overflow in Tenda W12 3.0.0.5<\/strong>"},"content":{"rendered":"

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

The cybersecurity landscape is ever-changing, and one of the latest threats to emerge is the CVE-2025-3693 vulnerability. This is a critical vulnerability found in the Tenda W12 3.0.0.5, a popular wireless router. This vulnerability, if exploited, can lead to a stack-based buffer overflow<\/a>, potentially compromising the system or leading to data leakage. The exploit has been publicly disclosed and can be remotely<\/a> launched, which makes it a serious concern for users and administrators of this device.
\nAs the function cgiWifiRadioSet of the file \/bin\/httpd is affected, this vulnerability is of significant importance<\/a>. A successful exploit can lead to unauthorized system access<\/a>, data compromise, and potential hijacking of the device for malicious purposes. Therefore, it is essential to understand the nature of this vulnerability<\/a> and implement the appropriate mitigation measures.<\/p>\n

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

CVE ID: CVE-2025-3693
\nSeverity: Critical (8.8 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise, potential data leakage<\/a><\/p>\n

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

Product | Affected Versions<\/p>\n

Tenda W12<\/a> | 3.0.0.5<\/p>\n

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

The exploit works by manipulating the cgiWifiRadioSet function of the \/bin\/httpd file in Tenda W12<\/a> version 3.0.0.5. This manipulation leads to a stack-based buffer overflow<\/a>, which is a type of error where the stack pointer exceeds the stack bound. This can overwrite valuable data and control information, which can corrupt the system and lead to unauthorized access<\/a> or system crashes.<\/p>\n

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

The following is a conceptual example of how this vulnerability might be exploited<\/a>:<\/p>\n

POST \/cgi-bin\/httpd\/cgiWifiRadioSet HTTP\/1.1\nHost: vulnerable-tenda-router.com\nContent-Type: application\/x-www-form-urlencoded\n{\"wifiRadioSet\": \"OVERFLOWING_PAYLOAD_STRING\"}<\/code><\/pre>\n
In this example, the attacker sends an overflowing payload string to the cgiWifiRadioSet function<\/a>. This can overflow the stack<\/a> buffer, potentially leading to unauthorized access and system compromise. Note that this is a simplified example and actual exploitation might require more complex methods and a deep understanding of the system internals.<\/p>\n
Mitigation<\/strong><\/p>\n
As a mitigation measure, it is recommended to apply the vendor patch immediately if available. If the patch is not available or cannot be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation. These can help detect and block exploit attempts. However, they are not a permanent solution and the patch should be applied as soon as possible.
\nRemember, the best defense against such vulnerabilities is a proactive approach to security<\/a>. Regularly updating your systems, using intrusion detection systems, and following best security<\/a> practices can significantly reduce the risk of such exploits.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The cybersecurity landscape is ever-changing, and one of the latest threats to emerge is the CVE-2025-3693 vulnerability. This is a critical vulnerability found in the Tenda W12 3.0.0.5, a popular wireless router. This vulnerability, if exploited, can lead to a stack-based buffer overflow, potentially compromising the system or leading to data leakage. The exploit […]<\/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-29636","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