{"id":86866,"date":"2026-04-04T10:12:09","date_gmt":"2026-04-04T10:12:09","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-55603-buffer-overflow-vulnerability-in-tenda-ax3-v16-03-12-10-cn","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-55603-buffer-overflow-vulnerability-in-tenda-ax3-v16-03-12-10-cn\/","title":{"rendered":"CVE-2025-55603: Buffer Overflow Vulnerability in Tenda AX3 V16.03.12.10_CN<\/strong>"},"content":{"rendered":"

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

This report provides a detailed analysis of a high-risk vulnerability, CVE-2025-55603, affecting Tenda AX3 V16.03.12.10_CN. This vulnerability, a buffer overflow, has the potential to compromise systems and leak sensitive data. It is, therefore, of significant concern to users and administrators of this product.<\/p>\n

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

CVE ID: CVE-2025-55603
\nSeverity: High (7.5 CVSS Score)
\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 AX3 | V16.03.12.10_CN<\/p>\n

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

The CVE-2025-55603 exploit works by taking advantage of a buffer overflow vulnerability in the fromSetSysTime function of Tenda AX3 V16.03.12.10_CN. This vulnerability is triggered when large amounts of data are inputted into the ntpServer parameter, causing an overflow of the buffer and potentially leading to arbitrary code execution or system crashes.<\/p>\n

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

Below is a conceptual example of how this vulnerability might be exploited, using a specially crafted HTTP request to the vulnerable endpoint:<\/p>\n

POST \/fromSetSysTime HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nntpServer=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA.........................................<\/code><\/pre>\n
In this example, the ‘A’s represent an excessively large input that could overflow the buffer.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
The most effective mitigation against this vulnerability is to apply the vendor-provided patch. If this is not immediately possible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure by detecting and blocking exploit attempts. Regularly updating and patching software is crucial for maintaining a strong security posture and protecting against such vulnerabilities.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview This report provides a detailed analysis of a high-risk vulnerability, CVE-2025-55603, affecting Tenda AX3 V16.03.12.10_CN. This vulnerability, a buffer overflow, has the potential to compromise systems and leak sensitive data. It is, therefore, of significant concern to users and administrators of this product. Vulnerability Summary CVE ID: CVE-2025-55603 Severity: High (7.5 CVSS Score) Attack […]<\/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-86866","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