CVE-2023-21674 vulnerability in Microsoft Products
Published on January 10, 2023


Known Exploited Vulnerability
This Microsoft Windows Advanced Local Procedure Call (ALPC) Privilege Escalation Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Microsoft Windows Advanced Local Procedure Call (ALPC) contains an unspecified vulnerability that allows for privilege escalation.
The following remediation steps are recommended / required by January 31, 2023: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2023-21674 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 2.0 out of four. The potential impact of an exploit of this vulnerability is considered to be very high.
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2023-21674 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2023-21674
You can be notified by stack.watch whenever vulnerabilities like CVE-2023-21674 are published in these products:
What versions are vulnerable to CVE-2023-21674?
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Microsoft Windows Server 2012 Version r2
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Microsoft Windows Rt 8 1 Version -
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Microsoft Windows 10 20h2 Fixed in Version 10.0.19042.2486
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Microsoft Windows 11 21h2 Fixed in Version 10.0.22000.1455
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Microsoft Windows 11 22h2 Fixed in Version 10.0.22621.1105
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Microsoft Windows 10 21h2 Fixed in Version 10.0.19044.2486
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Microsoft Windows 10 22h2 Fixed in Version 10.0.19045.2486
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Microsoft Windows 10 1809 Fixed in Version 10.0.17763.3887
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Microsoft Windows 10 1607 Fixed in Version 10.0.14393.5648
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Microsoft Windows 10 1507 Fixed in Version 10.0.10240.19685
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Microsoft Windows Server 2016 Fixed in Version 10.0.14393.5648
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Microsoft Windows Server 2019 Fixed in Version 10.0.17763.3887
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Microsoft Windows Server 2022 Fixed in Version 10.0.20348.1487