Vulnerability · Published Feb 8, 2026 · Assigned by VulDB

CVE-2026-2143D-Link DIR-823X DDNS Service set_ddns 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 5.0% (higher than 92% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)5.0%top 7.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A security vulnerability has been detected in D-Link DIR-823X 250416. This issue affects some unknown processing of the file /goform/set_ddns of the component DDNS Service. The manipulation of the argument ddnsType/ddnsDomainName/ddnsUserName/ddnsPwd leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used.

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-344778 | D-Link DIR-823X DDNS Service set_ddns os command injection vdb-entry, technical-description
VDB-344778 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #747492 | D-Link DIR-823X 250416 OS Command Injection third-party-advisory
https://github.com/master-abc/cve/issues/25 exploit, issue-tracking
https://www.dlink.com/ product