Skip to content
CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-21243

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

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
microsoft

Description

Null pointer dereference in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to deny service over a network.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Microsoft Windows Server 2019

  • 10.0.17763.0 to < 10.0.17763.8389affected

Microsoft Windows Server 2019 (Server Core installation)

  • 10.0.17763.0 to < 10.0.17763.8389affected

Microsoft Windows Server 2022

  • 10.0.20348.0 to < 10.0.20348.4773affected

Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)

  • 10.0.25398.0 to < 10.0.25398.2149affected

Microsoft Windows Server 2025

  • 10.0.26100.0 to < 10.0.26100.32370affected

Microsoft Windows Server 2025 (Server Core installation)

  • 10.0.26100.0 to < 10.0.26100.32370affected

References