{"id":87007,"date":"2026-04-27T16:12:50","date_gmt":"2026-04-27T16:12:50","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-57638-critical-buffer-overflow-vulnerability-in-tenda-ac9-1-0","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-57638-critical-buffer-overflow-vulnerability-in-tenda-ac9-1-0\/","title":{"rendered":"CVE-2025-57638: Critical Buffer Overflow Vulnerability in Tenda AC9 1.0<\/strong>"},"content":{"rendered":"

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

The vulnerability CVE-2025-57638 is a critical buffer overflow flaw in Tenda AC9 version 1.0, which could lead to potential system compromise or data leakage. This vulnerability is particularly concerning due to the widespread use of Tenda products in various sectors, making it an attractive target for malicious actors. The vulnerability stems from an improperly handled user-supplied sys.vendor configuration value.<\/p>\n

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

CVE ID: CVE-2025-57638
\nSeverity: Critical (CVSS: 7.5)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system compromise or data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

Tenda AC9 | 1.0<\/p>\n

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

This vulnerability is exploited when a user-supplied sys.vendor configuration value is improperly handled, triggering a buffer overflow. The overflow can overwrite adjacent memory locations, potentially allowing execution of arbitrary code or causing a system crash. This can lead to system compromise or data leakage if exploited successfully.<\/p>\n

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

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

POST \/sys.vendor\/configure HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"sys.vendor\": \"OVERFLOW_STRING\" }<\/code><\/pre>\n
In this example, the “OVERFLOW_STRING” would be manipulated to be larger than the buffer allocated for the sys.vendor value. When this request is processed by the Tenda AC9, it results in a buffer overflow, potentially leading to arbitrary code execution or a system crash.<\/p>\n
Mitigation<\/strong><\/p>\n
Users are strongly advised to apply the latest vendor patch to mitigate this vulnerability. If a patch is not available, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation. However, these measures do not completely remove the vulnerability and only provide protection against known exploit techniques.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The vulnerability CVE-2025-57638 is a critical buffer overflow flaw in Tenda AC9 version 1.0, which could lead to potential system compromise or data leakage. This vulnerability is particularly concerning due to the widespread use of Tenda products in various sectors, making it an attractive target for malicious actors. The vulnerability stems from an improperly […]<\/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":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-87007","post","type-post","status-publish","format-standard","hentry"],"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