What’s Vulnerable › Vulnerabilities

CVE-2026-4565: Tenda AC21 SetNetControlList formSetQosBand buffer overflow

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-23 · updated 2026-06-17
• Weakness: CWE-119

Description

A vulnerability was detected in Tenda AC21 16.03.08.16. Impacted is the function formSetQosBand of the file /goform/SetNetControlList. Performing a manipulation of the argument list results in buffer overflow. The attack can be initiated remotely. The exploit is now public and may be used.

Affected products

• Tenda AC21: 16.03.08.16

References

• https://github.com/hellonestor/killallbug/issues/14
• https://github.com/hellonestor/killallbug/releases/tag/poc
• https://vuldb.com/?ctiid.352402
• https://vuldb.com/?id.352402
• https://vuldb.com/?submit.775119
• https://www.tenda.com.cn/

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