CVE-2026-34339

MEDIUM

Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability

Title source: cna
STIX 2.1

Description

Null pointer dereference in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to deny service locally.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34339

Scores

CVSS v3 5.5
EPSS 0.0004
EPSS Percentile 13.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-476
Status published
Products (30)
Microsoft/Windows 10 Version 1607 10.0.14393.0 - 10.0.14393.9140
Microsoft/Windows 10 Version 1809 10.0.17763.0 - 10.0.17763.8755
Microsoft/Windows 10 Version 21H2 10.0.19044.0 - 10.0.19044.7291
Microsoft/Windows 10 Version 22H2 10.0.19045.0 - 10.0.19045.7291
Microsoft/Windows 11 version 22H3 10.0.22631.0 - 10.0.22631.7079
Microsoft/Windows 11 Version 23H2 10.0.22631.0 - 10.0.22631.7079
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.8457
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.8457
Microsoft/Windows 11 version 26H1 10.0.28000.0 - 10.0.28000.2113
Microsoft/Windows Server 2016 10.0.14393.0 - 10.0.14393.9140
... and 20 more
Published May 12, 2026
Tracked Since May 12, 2026