CVE-2023-21687

HTTP.sys Information Disclosure Vulnerability

CVE-2023-21687 is fixed in 6 products on 1 platform, first by KB5022845, released February 14, 2023. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.5

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0047

40th percentile

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 11 Version 22H2 for ARM64-based Systems	22621.1265	KB5022845	Feb 14, 2023
Windows 11 Version 22H2 for x64-based Systems	22621.1265	KB5022845	Feb 14, 2023
Windows 11 version 21H2 for ARM64-based Systems	22000.1574	KB5022836	Feb 14, 2023
Windows 11 version 21H2 for x64-based Systems	22000.1574	KB5022836	Feb 14, 2023
Windows Server 2022		KB5022921	Feb 14, 2023
Windows Server 2022	20348.1547	KB5022842	Feb 14, 2023
Windows Server 2022 (Server Core installation)		KB5022921	Feb 14, 2023
Windows Server 2022 (Server Core installation)	20348.1547	KB5022842	Feb 14, 2023

Details

Published
February 14, 2023
Weakness
Out-of-bounds Read
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21687

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/cve/CVE-2023-21687">CVE-2023-21687 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Is this on your machines?

Patchblox finds every install below the fixed version on Windows, macOS and Linux, and updates them through your release rings.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.