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 possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

CVSS 4.0

7.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

4.2% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-25)

CWEs

CWE-119, CWE-121

Published

2025-11-20

Modified

2026-10-18

Record from

the NVD, synced 2026-10-19

Affected

• tenda:ac21_firmware

References

• https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN8.md
• https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN9.md
• https://vuldb.com/?ctiid.333018
• https://vuldb.com/?id.333018
• https://vuldb.com/?submit.694425

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