Windows Lightweight Directory Access Protocol (LDAP) Remote Code Execution Vulnerability

published 2023-01-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-25843

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.6%; EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

Patch / fix

fixed in 9

Microsoft Windows 10 Version 1809 10.0.17763.3887
Microsoft Windows Server 2019 10.0.17763.3887
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.3887
Microsoft Windows Server 2022 10.0.20348.1487
Microsoft Windows 10 Version 20H2 10.0.19042.2486
Microsoft Windows 11 version 21H2 10.0.22000.1455
Microsoft Windows 10 Version 21H2 10.0.19044.2486
Microsoft Windows 11 version 22H2 10.0.22621.1105
Microsoft Windows 10 Version 22H2 10.0.19045.2486

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 3 y ago (2023-01-06)

Exploit prediction

1.55% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows 10 Version 1809
Microsoft Windows Server 2019
Microsoft Windows Server 2019 (Server Core installation)
Microsoft Windows Server 2022
Microsoft Windows 10 Version 20H2
Microsoft Windows 11 version 21H2
Microsoft Windows 10 Version 21H2
Microsoft Windows 11 version 22H2
Microsoft Windows 10 Version 22H2

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2023-21676
vendor-advisory

Sources

CVE List CVE-2023-21676
NVD CVE-2023-21676

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