CVE-2026-1638

MEDIUM
2026-01-30 [email protected]
6.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:00 vuln.today
CVE Published
Jan 30, 2026 - 00:15 nvd
MEDIUM 6.3

Tags

Command Injection Ac21 Firmware

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.

Analysis

Command injection in Tenda AC21 firmware versions 1.1.1.1/1.dmzip/16.03.08.16 allows authenticated remote attackers to execute arbitrary commands via the dmzIp parameter in the mDMZSetCfg function. Public exploit code exists for this vulnerability, increasing the risk of active exploitation. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Validate input sanitization for user-controlled parameters.

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Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: +0.2
CVSS: +32
POC: 0

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CVE-2026-1638 vulnerability details – vuln.today
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