High severity · published Sep 28, 2025
CVE-2025-11091
Tenda AC21 SetStaticRouteCfg sscanf buffer overflow
8.8
CVSS
0.8%
EPSS
No
On KEV
Description
A security flaw has been discovered in Tenda AC21 up to 16.03.08.16. Affected by this vulnerability is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be exploited.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
AC21 · Tenda
16.03.08.0; 16.03.08.1; 16.03.08.2; 16.03.08.3; 16.03.08.4; 16.03.08.5; +11 more · source: vendor
AF
Ac21 Firmware · Tenda
through 16.03.08.16 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11091
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11091
Exploit
https://github.com/maximdevere/CVE2/issues/2
Permissions Required
https://vuldb.com/?ctiid.326173
Third Party Advisory
https://vuldb.com/?id.326173
Third Party Advisory
https://vuldb.com/?submit.661806
Product
https://www.tenda.com.cn/
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