Buffer overflow in Tenda Ac21
CVE-2025-13446
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 possibl…
Vulnerability class: Buffer Overflow
EPSS: 0.004 (63.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). 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.
Affected products
- Tenda Ac21 — versions 16.03.08.16
Weakness classification (CWE)
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)
- github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN8.md (related)
- github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN9.md (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2025-13446?
- CVE-2025-13446 is a high-severity vulnerability in Tenda Ac21, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2025-11-20.
- How severe is CVE-2025-13446?
- High severity. CVSS v3 base score is 8.8 out of 10.