CVE-2026-4565

high

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.

References

https://www.tenda.com.cn/

https://vuldb.com/?submit.775119

https://vuldb.com/?id.352402

https://vuldb.com/?ctiid.352402

https://github.com/hellonestor/killallbug/releases/tag/poc

https://github.com/hellonestor/killallbug/issues/14

Details

Source: Mitre, NVD

Published: 2026-03-23

Updated: 2026-03-23

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

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

Severity: High

CVSS v4

Base Score: 8.7

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Severity: High