CVE-2026-1638: Tenda AC21 mDMZSetCfg command injection

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-30 · updated 2026-06-17
Weakness: CWE-74

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

Tenda AC21: 16.03.08.16

References

https://github.com/LX-LX88/cve/issues/26
https://vuldb.com/?ctiid.343417
https://vuldb.com/?id.343417
https://vuldb.com/?submit.740871
https://www.tenda.com.cn/

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