May 2026: Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability
CVE-2026-34339 Published on May 12, 2026
Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability
Null pointer dereference in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to deny service locally.
Weakness Type
NULL Pointer Dereference
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions.
Products Associated with CVE-2026-34339
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Affected Versions
Microsoft Windows 10 Version 1607:- Version 10.0.14393.0 and below 10.0.14393.9140 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8755 is affected.
- Version 10.0.19044.0 and below 10.0.19044.7291 is affected.
- Version 10.0.19045.0 and below 10.0.19045.7291 is affected.
- Version 10.0.22631.0 and below 10.0.22631.7079 is affected.
- Version 10.0.22631.0 and below 10.0.22631.7079 is affected.
- Version 10.0.26100.0 and below 10.0.26100.8457 is affected.
- Version 10.0.26200.0 and below 10.0.26200.8457 is affected.
- Version 10.0.28000.0 and below 10.0.28000.2113 is affected.
- Version 10.0.14393.0 and below 10.0.14393.9140 is affected.
- Version 10.0.14393.0 and below 10.0.14393.9140 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8755 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8755 is affected.
- Version 10.0.20348.0 and below 10.0.20348.5139 is affected.
- Version 10.0.25398.0 and below 10.0.25398.2330 is affected.
- Version 10.0.26100.0 and below 10.0.26100.32860 is affected.
- Version 10.0.26100.0 and below 10.0.26100.32860 is affected.