{"id":69190,"date":"2025-08-31T16:12:27","date_gmt":"2025-08-31T16:12:27","guid":{"rendered":""},"modified":"2025-09-16T07:08:54","modified_gmt":"2025-09-16T13:08:54","slug":"cve-2025-9297-critical-buffer-overflow-vulnerability-in-tenda-i22-1-0-0-3-4687","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-9297-critical-buffer-overflow-vulnerability-in-tenda-i22-1-0-0-3-4687\/","title":{"rendered":"CVE-2025-9297: Critical Buffer Overflow Vulnerability in Tenda i22 1.0.0.3(4687)<\/strong>"},"content":{"rendered":"

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

A critical vulnerability has been identified in Tenda i22 1.0.0.3(4687), a widely used router. The vulnerability, tracked as CVE-2025-9297, affects the formWeixinAuthInfoGet function of the \/goform\/wxportalauth file. This flaw allows potential attackers to manipulate the ‘Type’ argument, leading to a stack-based buffer overflow<\/a>. This can be exploited remotely and may result in a system compromise<\/a> or data leakage, posing a significant risk to the confidentiality, integrity, and availability of user data and systems.<\/p>\n

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

CVE ID: CVE-2025-9297
\nSeverity: Critical, CVSS 8.8
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise and potential<\/a> data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

Tenda i22 | 1.0.0.3(4687)<\/p>\n

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

The vulnerability stems from improper<\/a> input validation in the formWeixinAuthInfoGet function. When processing an argument labeled ‘Type,’ the function fails to adequately check the size of the user-supplied data. This allows an attacker to provide an excessively long string, causing the program to overwrite the stack’s memory. This could allow an attacker to execute arbitrary code<\/a> with the privileges of the affected service, leading to potential unauthorized access, information disclosure, or denial of service.<\/p>\n

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

Here is a conceptual example of how the vulnerability might be exploited using a maliciously crafted HTTP request:<\/a><\/p>\n

POST \/goform\/wxportalauth HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nType=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...[Long string of 'A's causing buffer overflow]<\/code><\/pre>\n
The above example demonstrates a buffer overflow<\/a> attack, where the ‘Type’ parameter is supplied with a long string of ‘A’s, which exceeds the buffer’s limit, leading to the overflow.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
The most effective mitigation for this vulnerability is to apply the vendor-supplied patch. Until the patch can be applied, it is recommended to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to detect and block attempts to exploit this vulnerability<\/a>. Configuring these systems<\/a> to look for unusually long ‘Type’ argument values can help identify and block malicious requests.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A critical vulnerability has been identified in Tenda i22 1.0.0.3(4687), a widely used router. The vulnerability, tracked as CVE-2025-9297, affects the formWeixinAuthInfoGet function of the \/goform\/wxportalauth file. This flaw allows potential attackers to manipulate the ‘Type’ argument, leading to a stack-based buffer overflow. This can be exploited remotely and may result in a system […]<\/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":[86,87],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-69190","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-dos"],"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