What’s Vulnerable › Vulnerabilities

CVE-2025-11091: Tenda AC21 SetStaticRouteCfg sscanf buffer overflow

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-09-28 · updated 2026-10-09
• Weakness: CWE-119

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.

Affected products

• Tenda AC21: through 16.03.08.16

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/
• https://github.com/maximdevere/CVE2/issues/2

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