CVE-2026-2872 HIGH

CVE-2026-2872: Tenda A21 MAC Filtering Configuration Endpoint setBlackRule set_device_name stack-based overflow

Vendor Tenda
Product A21
Weakness CWE-121
Published February 21, 2026
Last update February 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 security vulnerability has been detected in Tenda A21 1.0.0.0. This vulnerability affects the function set_device_name of the file /goform/setBlackRule of the component MAC Filtering Configuration Endpoint. Such manipulation of the argument devName/mac leads to stack-based buffer overflow. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.

Key dates

02Disclosure timeline

February 21, 2026 CVE published
February 23, 2026 Record updated