CVE-2026-1638

Tenda AC21 mDMZSetCfg command injection

State: Published
Severity: 5.3 Medium
Published: Jan 29, 2026
Updated: Feb 23, 2026
Reserved: Jan 29, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	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	VulDB
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R	VulDB
3.0	6.3 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R	VulDB
2.0	6.5 Medium	AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR	VulDB

Weaknesses

CWE-77 Command Injection
CWE-74 Injection

Affected Products

Product	Versions
AC21Tenda	1.1.1.1Affected 1.dmzipAffected 16.03.08.16Affected

References

VDB-343417 | Tenda AC21 mDMZSetCfg command injectionvdb-entrytechnical-description
VDB-343417 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
Submit #740871 | Tenda AC21 V16.03.08.16 Command Injectionthird-party-advisory
https://github.com/LX-LX88/cve/issues/26broken-linkexploitissue-tracking
https://www.tenda.com.cn/product

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