CVE-2026-33826

EUVD-2026-22645
Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8 HIGH
ADJACENT_NETWORK
LOW
LOW
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 78%
Affected Products (NVD)
VendorProductVersion
microsoftwindows_server_2016
𝑥
< 10.0.14393.9060
microsoftwindows_server_2019
𝑥
< 10.0.17763.8644
microsoftwindows_server_2022
𝑥
< 10.0.20348.5020
microsoftwindows_server_2022_23h2
𝑥
< 10.0.25398.2274
microsoftwindows_server_2025
𝑥
< 10.0.26100.32690
𝑥
= Vulnerable software versions
Windows Releases
Platform
Version
Windows Server 2012 R2
Server Core
KB5082126
Standard
KB5082126
Windows Server 2016
Server Core
KB5082198
Standard
KB5082198
Windows Server 2019
Server Core
KB5082123
Standard
KB5082123
Windows Server 2022
23H2 Server Core
KB5082060
Server Core
KB5082142
Standard
KB5082142
Windows Server 2025
Server Core
KB5082063
Standard
KB5082063
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33826