What’s Vulnerable › Vulnerabilities

CVE-2023-21776: Windows Kernel Information Disclosure Vulnerability

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-01-10 · updated 2026-06-17
• Weakness: CWE-125

Description

Windows Kernel Information Disclosure Vulnerability

Affected products

• Microsoft Windows 10 Version 1607: 20h2, 21h2, 22h2, 1607, 1809
• Microsoft Windows 11 version 21H2: 21h2, 22h2
• Microsoft Windows 7: all versions
• Microsoft Windows 8.1: all versions
• Microsoft Windows RT 8.1: all versions
• 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 2022: all versions

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21776
• http://packetstormsecurity.com/files/172300/Windows-Kernel-CmpDoReDoCreateKey-CmpDoReOpenTransKey-Out-Of-Bounds-Read.html
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21776

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