CVE-2026-4565

HIGH

Tenda AC21 SetNetControlList formSetQosBand buffer overflow

Title source: cna

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 (6)

[Issue Tracking] https://github.com/hellonestor/killallbug/issues/14

[Vdb Entry, Technical Description] https://vuldb.com/?id.352402

[Signature, Permissions Required] https://vuldb.com/?ctiid.352402

[Third Party Advisory] https://vuldb.com/?submit.775119

[Patch] https://github.com/hellonestor/killallbug/releases/tag/poc

[Product] https://www.tenda.com.cn/

Scores

CVSS v3 8.8

EPSS 0.0009

EPSS Percentile 24.9%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-119 CWE-120

Status published

Products (2)

Tenda/AC21 16.03.08.16

tenda/ac21_firmware 16.03.08.16

Published Mar 23, 2026

Tracked Since Mar 23, 2026