How severe is CVE-2021-28310?

CVE-2021-28310 has a CVSS 3.1 base score of 7.8 (HIGH). EPSS estimates a 8.3% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2021-28310: Win32k Elevation of Privilege

CISA Known Exploited Vulnerabilities

Microsoft Win32k Privilege Escalation Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2021-11-03

Remediation due

2021-11-17

Required action
Apply updates per vendor instructions.

CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2021-28310

Description

Win32k Elevation of Privilege Vulnerability

Severity

CVSS 3.1 · CNA7.8 HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Affected Products

Vendor	Product	Affected versions
Microsoft	Windows 10 Version 1803	10.0.0 to <publication
Microsoft	Windows 10 Version 1809	10.0.0 to <publication
Microsoft	Windows Server 2019	10.0.0 to <publication
Microsoft	Windows Server 2019 (Server Core installation)	10.0.0 to <publication
Microsoft	Windows 10 Version 1909	10.0.0 to <publication
Microsoft	Windows Server, version 1909 (Server Core installation)	10.0.0 to <publication
Microsoft	Windows 10 Version 2004	10.0.0 to <publication
Microsoft	Windows Server version 2004	10.0.0 to <publication
Microsoft	Windows 10 Version 20H2	10.0.0 to <publication
Microsoft	Windows Server version 20H2	10.0.0 to <publication

References

1 Links

Other references

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28310

Record Details

Published

2021-04-13

Last updated

2025-10-21

Assigner (CNA)

microsoft

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.