CVE-2023-36424MicrosoftOperating systemsApril 13, 2026

Microsoft Windows Out-of-Bounds Read Vulnerability

High 7.8Actively exploited

Description

Microsoft Windows Common Log File System Driver contains an out-of-bounds read vulnerability that could allow a threat actor for privileges escalation

What to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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Details

Vendor
Microsoft
Product
Windows
CVE
CVE-2023-36424
Affected versions
Windows 11 version 22H3 10.0: from 10.0.22631.0 to 10.0.22631.2715 (excluded) — fixed in 10.0.22631.2715
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0: from 10.0.25398.0 to 10.0.25398.531 (excluded) — fixed in 10.0.25398.531
Windows 11 Version 23H2 10.0: from 10.0.22631.0 to 10.0.22631.2715 (excluded) — fixed in 10.0.22631.2715
Windows 10 Version 1809 10.0: from 10.0.17763.0 to 10.0.17763.5122 (excluded); from 10.0.0 to 10.0.17763.5122 (excluded) — fixed in 10.0.17763.5122
Windows Server 2019 10.0: from 10.0.17763.0 to 10.0.17763.5122 (excluded) — fixed in 10.0.17763.5122
Windows Server 2019 (Server Core installation) 10.0: from 10.0.17763.0 to 10.0.17763.5122 (excluded) — fixed in 10.0.17763.5122
Windows Server 2022 10.0: from 10.0.20348.0 to 10.0.20348.2113 (excluded) — fixed in 10.0.20348.2113
Windows 11 version 21H2 10.0: from 10.0.0 to 10.0.22000.2600 (excluded) — fixed in 10.0.22000.2600
Windows 10 Version 21H2 10.0: from 10.0.19043.0 to 10.0.19043.3693 (excluded) — fixed in 10.0.19043.3693
Windows 11 version 22H2 10.0: from 10.0.22621.0 to 10.0.22621.2715 (excluded) — fixed in 10.0.22621.2715
Windows 10 Version 22H2 10.0: from 10.0.19045.0 to 10.0.19045.3693 (excluded) — fixed in 10.0.19045.3693
Windows 10 Version 1507 10.0: from 10.0.10240.0 to 10.0.10240.20308 (excluded) — fixed in 10.0.10240.20308
Windows 10 Version 1607 10.0: from 10.0.14393.0 to 10.0.14393.6452 (excluded) — fixed in 10.0.14393.6452
Windows Server 2016 10.0: from 10.0.14393.0 to 10.0.14393.6452 (excluded) — fixed in 10.0.14393.6452
Windows Server 2016 (Server Core installation) 10.0: from 10.0.14393.0 to 10.0.14393.6452 (excluded) — fixed in 10.0.14393.6452
Windows Server 2008 Service Pack 2 6.0: from 6.0.6003.0 to 6.0.6003.22367 (excluded) — fixed in 6.0.6003.22367
Windows Server 2008 Service Pack 2 (Server Core installation 6.0: from 6.0.6003.0 to 6.0.6003.22367 (excluded) — fixed in 6.0.6003.22367
Windows Server 2008 Service Pack 2 6.0: from 6.0.6003.0 to 6.0.6003.22367 (excluded) — fixed in 6.0.6003.22367
Windows Server 2008 R2 Service Pack 1 6.1: from 6.1.7601.0 to 6.1.7601.26816 (excluded) — fixed in 6.1.7601.26816
Windows Server 2008 R2 Service Pack 1 (Server Core installat 6.1: from 6.1.7601.0 to 6.1.7601.26816 (excluded) — fixed in 6.1.7601.26816
Windows Server 2012 6.2: from 6.2.9200.0 to 6.2.9200.24569 (excluded) — fixed in 6.2.9200.24569
Windows Server 2012 (Server Core installation) 6.2: from 6.2.9200.0 to 6.2.9200.24569 (excluded) — fixed in 6.2.9200.24569
Windows Server 2012 R2 6.3: from 6.3.9600.0 to 6.3.9600.21668 (excluded) — fixed in 6.3.9600.21668
Windows Server 2012 R2 (Server Core installation) 6.3: from 6.3.9600.0 to 6.3.9600.21668 (excluded) — fixed in 6.3.9600.21668 (from the advisory and NVD; check the exact builds in the official advisory)
CVSS score
7.8
Actively exploited
Yes, listed in the CISA Known Exploited Vulnerabilities catalog
CISA due date
April 27, 2026 (deadline for US federal agencies: a good benchmark for you too)
Source
CISA KEV – original advisory
Published
April 13, 2026

The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.

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