CVE-2025-11091

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 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

8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.8% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-25)

CWEs

CWE-119, CWE-120

Published

2025-09-28

Modified

2026-10-09

Record from

the NVD, synced 2026-10-19

Affected

• tenda:ac21_firmware

References

• https://github.com/maximdevere/CVE2/issues/2
• https://vuldb.com/?ctiid.326173
• https://vuldb.com/?id.326173
• https://vuldb.com/?submit.661806
• https://www.tenda.com.cn/

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