CVE-2026-1638 MEDIUM

CVE-2026-1638: Tenda AC21 mDMZSetCfg command injection

Vendor Tenda
Product AC21
Weakness CWE-77
Published January 29, 2026
Last update February 23, 2026
View on NVD All CVEs

CVSS base score

5.3/10
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:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A security flaw has been discovered in Tenda AC21 1.1.1.1/1.dmzip/16.03.08.16. The impacted element is the function mDMZSetCfg of the file /goform/mDMZSetCfg. The manipulation of the argument dmzIp results in command injection. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.

Key dates

02Disclosure timeline

January 29, 2026 CVE published
February 23, 2026 Record updated