Vulnerability · Published Feb 8, 2026 · Assigned by VulDB

CVE-2026-2155D-Link DIR-823X Configuration set_dmz sub_4208A0 os command injection

High 7.2

In plain English

A high-severity OS command injection in DIR-823X from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 4.6% (higher than 92% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)4.6%top 8.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 (as reported)

Vendor	Product	Versions
D-Link	DIR-823X	250416

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-344857 | D-Link DIR-823X Configuration set_dmz sub_4208A0 os command injection vdb-entry, technical-description
VDB-344857 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #748236 | D-Link DIR-823X 250416 OS Command Injection third-party-advisory
Submit #750038 | D-Link DIR-823X 250416 OS Command Injection (Duplicate) third-party-advisory
https://github.com/master-abc/cve/issues/32 exploit, issue-tracking
https://www.dlink.com/ product