Vulnerability · NVD
CVE-2026-21243
HIGH 7.5
Vendor bulletin scale — NVD CVSS pending
Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability
EPSS
1.34%
above median
percentile 68.7%
OS versions that fix this CVE
This CVE is resolved by the following OS security releases. Update the OS to at least the listed version.
- Windows Server 2025 Fixed in 10.0.26100.32370
- Windows Server 2022 (Server Core installation) Fixed in 10.0.20348.4773
- Windows Server 2022 Fixed in 10.0.25398.2149
- Windows Server 2019 Fixed in 10.0.17763.8389