CVE-2022-21884: Local Security Authority Subsystem Service Elevation of Privilege Vulnerability

Severity: high (CVSS 7.2 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-01-11 · updated 2026-06-17

Description

Local Security Authority Subsystem Service Elevation of Privilege Vulnerability

Affected products

Microsoft Windows Server: 20h2, 2022
Microsoft Windows Server 2008: r2-sp1
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: all versions
Microsoft Windows Server 2019: all versions
Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0 before 6.1.7601.25829 — fixed in 6.1.7601.25829
Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before 6.0.6003.21349 — fixed in 6.0.6003.21349
Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.23584 — fixed in 6.2.9200.23584
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.20246 — fixed in 6.3.9600.20246
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.4886 — fixed in 10.0.14393.4886
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.2452 — fixed in 10.0.17763.2452
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.469 — fixed in 10.0.20348.469
Microsoft Windows Server version 20H2: from 10.0.0 before 10.0.19042.1466 — fixed in 10.0.19042.1466

How to fix

Upgrade to a fixed version: Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.25829; Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21349; Microsoft Windows Server 2012 6.2.9200.23584; Microsoft Windows Server 2012 R2 6.3.9600.20246; Microsoft Windows Server 2016 10.0.14393.4886; Microsoft Windows Server 2019 10.0.17763.2452; Microsoft Windows Server 2022 10.0.20348.469; Microsoft Windows Server version 20H2 10.0.19042.1466. Check the vendor advisory for mitigations.

References

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