{"id":57291,"date":"2025-07-05T05:29:53","date_gmt":"2025-07-05T05:29:53","guid":{"rendered":""},"modified":"2025-10-22T19:05:07","modified_gmt":"2025-10-23T01:05:07","slug":"cve-2025-6886-critical-buffer-overflow-vulnerability-in-tenda-ac5-15-03-06-47","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6886-critical-buffer-overflow-vulnerability-in-tenda-ac5-15-03-06-47\/","title":{"rendered":"CVE-2025-6886: Critical Buffer Overflow Vulnerability in Tenda AC5 15.03.06.47<\/strong>"},"content":{"rendered":"

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

A severe vulnerability, identified as CVE-2025-6886, has been recently discovered within the Tenda AC5 15.03.06.47. This vulnerability is classified as critical and poses significant risks to the affected systems. It impacts an unknown functionality of the file<\/a> \/goform\/openSchedWifi. The issue lies within the manipulation of the argument schedStartTime\/schedEndTime which leads to a stack-based buffer overflow<\/a>. This vulnerability is of particular concern as it can be exploited remotely and has the potential to compromise systems or leak sensitive data<\/a>.<\/p>\n

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

CVE ID: CVE-2025-6886
\nSeverity: Critical, CVSS Score: 8.8
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system compromise or data<\/a> leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

Tenda AC5<\/a> | 15.03.06.47<\/p>\n

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

The vulnerability exploits an unknown functionality in the file<\/a> \/goform\/openSchedWifi. By manipulating the argument schedStartTime\/schedEndTime, an attacker can trigger a stack-based buffer overflow<\/a>. This overflow can lead to unauthorized execution of arbitrary<\/a> code, system crashes, or information disclosure. It is worth noting that this attack can be launched remotely<\/a>, making it a significant threat.<\/p>\n

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

The following is a conceptual example of a malicious HTTP request that could potentially exploit this vulnerability<\/a>:<\/p>\n

POST \/goform\/openSchedWifi HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"schedStartTime\": \"large_string\", \"schedEndTime\":\"large_string\" }<\/code><\/pre>\n
In this example, the ‘large_string’ is a long, crafted string designed to overflow the buffer and potentially execute arbitrary code<\/a> or crash the system.<\/p>\n
Mitigation and Recommendations<\/strong><\/p>\n
The best practice to mitigate this vulnerability is to apply the vendor’s patch as soon as it is available. For temporary mitigation, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help prevent potential attacks. Regular monitoring and updating of your systems are also crucial to keep your environment secure<\/a>.
\nRemember, cybersecurity is not a one-time event but an ongoing process. Stay informed about the latest threats and vulnerabilities<\/a> and take proactive measures to protect your systems and data.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A severe vulnerability, identified as CVE-2025-6886, has been recently discovered within the Tenda AC5 15.03.06.47. This vulnerability is classified as critical and poses significant risks to the affected systems. It impacts an unknown functionality of the file \/goform\/openSchedWifi. The issue lies within the manipulation of the argument schedStartTime\/schedEndTime which leads to a stack-based buffer […]<\/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],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-57291","post","type-post","status-publish","format-standard","hentry","category-uncategorized","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