CVE & CISA-KEV Catalog

CVE-2023-21674

HIGHCISA KEVEPSS 99th pctl
8.8
CVSS v3
NVD

Description

Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability

CWE-416Use After Free

How to fix

Remediation Available
Windows 10Windows
Install:KB5022297Microsoft
Windows 10 Version 1607Windows
Install:KB5022289Microsoft
Windows 10 Version 1809Windows
Install:KB5022286Microsoft
Windows 10 Version 20H2Windows
Install:KB5022282Microsoft
Windows 10 Version 21H2Windows
Install:KB5022282Microsoft
Windows 10 Version 22H2Windows
Install:KB5022282Microsoft
Windows 11 Version 22H2Windows
Install:KB5022303Microsoft
Windows 11 version 21H2Windows
Install:KB5022287Microsoft
Windows 8.1Windows
Install:KB5022346Microsoft
Install:KB5022352Microsoft
Windows RT 8.1Windows
Install:KB5022346Microsoft
Windows Server 2012 R2Windows
Install:KB5022346Microsoft
Install:KB5022352Microsoft
Windows Server 2012 R2 (Server Core installation)Windows
Install:KB5022346Microsoft
Install:KB5022352Microsoft
Windows Server 2016Windows
Install:KB5022289Microsoft
Windows Server 2016 (Server Core installation)Windows
Install:KB5022289Microsoft
Windows Server 2019Windows
Install:KB5022286Microsoft
Windows Server 2019 (Server Core installation)Windows
Install:KB5022286Microsoft
Windows Server 2022Windows
Install:KB5022291Microsoft
Windows Server 2022 (Server Core installation)Windows
Install:KB5022291Microsoft

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploit Intelligence

41.81%probability of exploitation in 30 days
99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Microsoft Windows Advanced Local Procedure Call (ALPC) Privilege Escalation Vulnerability

Microsoft Windows Advanced Local Procedure Call (ALPC) contains an unspecified vulnerability that allows for privilege escalation.

Apply updates per vendor instructions.

Remediation due: 2023-01-31

References

Government Resource1

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2019-0708Critical9.8100%KEV + Ransom-
CVE-2021-31166Critical9.8100%KEVFix
CVE-2015-5119Critical9.899%KEV-
CVE-2010-3962High8.197%KEV-
CVE-2015-0313Critical9.896%KEVFix
CVE-2017-9798High7.595%-Fix
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CVE-2023-21674 severity badge

Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-30.