CVE-2026-4565 HIGH

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

Vendor Tenda
Product AC21
Weakness CWE-120
Published March 23, 2026
Last update March 23, 2026
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS 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/E:P

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 23, 2026 CVE published
March 23, 2026 Record updated