What’s Vulnerable › Vulnerabilities

CVE-2021-28310: Microsoft Win32k Privilege Escalation Vulnerability

• Severity: medium (CVSS 4.6 v2.0)
• Exploited in the wild: yes — in CISA KEV since 2021-11-03
• EPSS: 8.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-13 · updated 2026-06-17
• Weakness: CWE-787

Description

Win32k Elevation of Privilege Vulnerability

Affected products

• Microsoft Windows 10 1803: all versions
• Microsoft Windows 10: all versions
• Microsoft Windows 10 1909: all versions
• Microsoft Windows 10 2004: all versions
• Microsoft Windows 10 20H2: all versions
• Microsoft Windows Server 1909: all versions
• Microsoft Windows Server 2004: all versions
• Microsoft Windows Server 2019: all versions
• Microsoft Windows Server 20H2: all versions

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28310
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28310
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-28310

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