{"id":51860,"date":"2025-06-14T07:53:32","date_gmt":"2025-06-14T07:53:32","guid":{"rendered":""},"modified":"2025-08-30T04:39:09","modified_gmt":"2025-08-30T10:39:09","slug":"cve-2025-5798-critical-remote-stack-based-buffer-overflow-vulnerability-in-tenda-ac8","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-5798-critical-remote-stack-based-buffer-overflow-vulnerability-in-tenda-ac8\/","title":{"rendered":"CVE-2025-5798: Critical Remote Stack-Based Buffer Overflow Vulnerability in Tenda AC8<\/strong>"},"content":{"rendered":"

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

A critical vulnerability has been identified in Tenda AC8 routers, specifically version 16.03.34.09. This vulnerability, referenced as CVE-2025-5798, allows remote attackers to exploit a stack-based buffer overflow in the SetSysTimeCfg function. This vulnerability can lead<\/a> to serious consequences such as a full system compromise or data leakage, making it a significant security concern for any individual or organization utilizing the Tenda AC8. Immediate action is required to mitigate the risk.<\/p>\n

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

CVE ID: CVE-2025-5798
\nSeverity: Critical (CVSS 8.8)
\nAttack Vector: Remote
\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 AC8<\/a> | 16.03.34.09<\/p>\n

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

The vulnerability resides in the fromSetSysTime function of the file<\/a> \/goform\/SetSysTimeCfg. By manipulating the timeType argument, an attacker can cause a stack-based buffer overflow<\/a>. The overflow can be used to overwrite the program’s control flow, leading to remote code execution and potentially full system<\/a> compromise. The exploit can be triggered remotely without any user<\/a> interaction, making it a particularly dangerous vulnerability.<\/p>\n

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

The following conceptual example shows how the vulnerability might be exploited. The malicious payload would be crafted to overflow the buffer<\/a> and manipulate the program’s control flow.<\/p>\n

POST \/goform\/SetSysTimeCfg HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\ntimeType=1&timezone=<\/code><\/pre>\n
In this example, “ would be a specifically crafted string that causes the buffer overflow and leads to remote code<\/a> execution. This is just a hypothetical example to illustrate the nature of the vulnerability<\/a>. Actual exploit code may be significantly more complex and could depend on the specific system configuration<\/a>.<\/p>\n
Mitigation<\/strong><\/p>\n
Users of Tenda AC8 version 16.03.34.09 are advised to apply the patch provided by the vendor as soon as possible. As a temporary mitigation, users may also employ a Web<\/a> Application Firewall (WAF) or Intrusion Detection System (IDS) to detect and block exploit attempts. However, these measures will not fix the underlying vulnerability and are only intended as a stopgap until the patch can be applied.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A critical vulnerability has been identified in Tenda AC8 routers, specifically version 16.03.34.09. This vulnerability, referenced as CVE-2025-5798, allows remote attackers to exploit a stack-based buffer overflow in the SetSysTimeCfg function. This vulnerability can lead to serious consequences such as a full system compromise or data leakage, making it a significant security concern for […]<\/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":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-51860","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-rce"],"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