D-Link DIR-823X Web Management set_ac_server os command injection

published 2026-02-06 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-5598

cvss: 4.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 5.3%; EPSS 5.3% chance of exploitation in 30 days, percentile 92%
public exploits: 0; none known

A security flaw has been discovered in D-Link DIR-823X 250416. This vulnerability affects unknown code of the file /goform/set_ac_server of the component Web Management Interface. The manipulation of the argument ac_server results in os command injection. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 9 mo ago (2026-02-06)

Exploit prediction

5.29% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/master-abc/cve/issues/19 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
CNA	3.1	4.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	3.0	4.7	CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	2.0	5.8	AV:N/AC:L/Au:M/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
CNA	4.0	2.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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
CNA	3.1	4.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
NVD	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	5.8	AV:N/AC:L/Au:M/C:P/I:P/A:P

Affected products

D-Link DIR-823X

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command
CWE-77 Improper Neutralization of Special Elements used in a Command

References

github.com /master-abc/cve/issues/19
exploit, issue-tracking
vuldb.com /?id.344623
vdb-entry, technical-description, third-party-advisory
vuldb.com /?ctiid.344623
signature, permissions-required, vdb-entry
vuldb.com /?submit.744720
third-party-advisory, vdb-entry
dlink.com /
product

Sources

CVE List CVE-2026-2063
NVD CVE-2026-2063

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary