Overview
In the ever-evolving landscape of cybersecurity, a new vulnerability has been discovered in Tenda AC6 v15.03.05.16_multi routers. This vulnerability, identified as CVE-2025-50258, has been found to be susceptible to a buffer overflow attack via the SetSysTimeCfg function. This issue affects a wide range of users, from individual households to enterprise networks that use the vulnerable version of Tenda AC6 routers. The severity of this vulnerability lies in its potential to compromise systems or leak data, which is a significant threat to privacy and information security.
Vulnerability Summary
CVE ID: CVE-2025-50258
Severity: High (8.1 CVSS Score)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
Share secrets securely
Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.
Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.
- • Encrypted identity
- • Private Spaces for organizations and teams
- • End-to-end encrypted chat, calls, files, and notes
- • Sensitive AI work and protected collaboration
- • Built for information that cannot leak
Our mission is to secure human work alongside AI.
Product | Affected Versions
Tenda AC6 Router | v15.03.05.16_multi
How the Exploit Works
The vulnerability arises from a buffer overflow condition in the SetSysTimeCfg function of the Tenda AC6 router. A buffer overflow occurs when more data is written to a buffer than it can handle, causing an overflow of data into adjacent memory locations. In this case, the overflow is triggered via the time parameter, allowing a malicious attacker to execute arbitrary code or cause a denial of service.
Conceptual Example Code
Here’s a conceptual example of a malformed HTTP request that could exploit this vulnerability:
POST /SetSysTimeCfg HTTP/1.1
Host: target.router.ip
Content-Type: application/json
{
"time": "<buffer overflow inducing string>"
}In the above example, “ would be replaced by a string that causes the buffer to overflow, potentially allowing arbitrary code execution.
Impact and Mitigation
The impact of this vulnerability is severe, as it could potentially allow an attacker to compromise the entire system or lead to data leakage. The CVSS score of 8.1 further emphasizes the severity of this vulnerability.
To mitigate this vulnerability, users are urged to apply the vendor patch as soon as it becomes available. In the meantime, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure. These systems can detect and block suspicious activities, providing a layer of protection against potential attacks exploiting this vulnerability.