Critical severity · published Nov 20, 2025
CVE-2025-13446
A vulnerability has been found in Tenda AC21 16.03.08.16
9.8
CVSS
4.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.2% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AF
Ac21 Firmware · Tenda
16.03.08.16 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-13446
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-13446
Exploit
https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN8.md
Exploit
https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN9.md
Permissions Required
https://vuldb.com/?ctiid.333018
Third Party Advisory
https://vuldb.com/?id.333018
Third Party Advisory
https://vuldb.com/?submit.694425
Third Party Advisory
https://vuldb.com/?submit.694430
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