Vulnerability · Published Jan 29, 2026 · Assigned by VulDB

CVE-2026-1638Tenda AC21 mDMZSetCfg command injection

Medium 6.3

In plain English

A medium-severity command injection in AC21 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.2% (higher than 83% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)2.2%top 17.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Tenda	AC21	1.1.1.11.dmzip16.03.08.16

Weakness: CWE-77, CWE-74 · Vector: 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

References

VDB-343417 | Tenda AC21 mDMZSetCfg command injection vdb-entry, technical-description
VDB-343417 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #740871 | Tenda AC21 V16.03.08.16 Command Injection third-party-advisory
https://github.com/LX-LX88/cve/issues/26 broken-link, exploit, issue-tracking
https://www.tenda.com.cn/ product