CVE-2026-1638

Name: CVE-2026-1638
Creator: NVD / NIST
Published: 2026-01-30T00:15:57.563+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.1/10EPSS 1.84%

Last modified Jun 17, 2026

CVE-2026-1638 is a low-severity vulnerability rated 2.1/10 on the CVSS scale. 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. EPSS estimates a 1.84% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

2.1/10

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

1.84%

76.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Tenda	Ac21 Firmware	16.03.08.16

References

https://github.com/LX-LX88/cve/issues/26Broken Link
https://vuldb.com/?ctiid.343417Permissions Required, VDB Entry
https://vuldb.com/?id.343417Third Party Advisory, VDB Entry
https://vuldb.com/?submit.740871Third Party Advisory, VDB Entry
https://www.tenda.com.cn/Product

Timeline

Published: Jan 30, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-1638?

How severe is CVE-2026-1638?

CVE-2026-1638 has a CVSS score of 2.1/10 (LOW severity). The EPSS model estimates a 1.84% probability of exploitation in the next 30 days.

How do I fix CVE-2026-1638?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-1638?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST