CVE-2026-2155: D-Link DIR-823X Firmware

High severity, CVSS 7.2. EPSS: 4.6% chance of exploitation in the next 30 days.

A security flaw has been discovered in D-Link DIR-823X 250416. The affected element is the function sub_4208A0 of the file /goform/set_dmz of the component Configuration Handler. The manipulation of the argument dmz_host/dmz_enable results in os command injection. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.

Affected products

• D-Link DIR-823X Firmware: version 250416 only

Published 2026-02-08. Last modified 2026-06-17.