High severity8.0NVD Advisory· Published Apr 14, 2026· Updated Apr 17, 2026
CVE-2026-33826
CVE-2026-33826
Description
Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.
Affected products
6cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*range: <10.0.25398.2274
- cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*Range: <10.0.14393.9060
- cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*Range: <10.0.17763.8644
- cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*Range: <10.0.20348.5020
- cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*Range: <10.0.26100.32690
Patches
Vulnerability mechanics
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33826nvdVendor Advisory
News mentions
2- Patch Tuesday - April 2026Rapid7 Blog · Apr 14, 2026
- Microsoft Patch Tuesday for April 2026 - Snort Rule and Prominent VulnerabilitiesCisco Talos Intelligence · Apr 14, 2026