Vulnerability · Published Nov 20, 2025 · Assigned by VulDB
CVE-2025-13446Tenda AC21 SetSysTimeCfg stack-based overflow
High 8.8
In plain English
A high-severity stack buffer overflow in AC21 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 4.2% (higher than 91% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)4.2%top 9.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability has been found in Tenda AC21 16.03.08.16. This vulnerability affects unknown code of the file /goform/SetSysTimeCfg. The manipulation of the argument timeZone/time leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-333018 | Tenda AC21 SetSysTimeCfg stack-based overflow vdb-entry, technical-description
- VDB-333018 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #694425 | Tenda AC21 V16.03.08.16 Buffer Overflow third-party-advisory
- Submit #694430 | Tenda AC21 V16.03.08.16 Buffer Overflow (Duplicate) third-party-advisory
- https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN8.md related
- https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN9.md exploit
- https://www.tenda.com.cn/ product