How severe is CVE-2021-31199?

CVE-2021-31199 has a CVSS 3.1 base score of 5.2 (MEDIUM). EPSS estimates a 3.0% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2021-31199: Microsoft Enhanced Cryptographic Provider Elevation

CISA Known Exploited Vulnerabilities

Microsoft Enhanced Cryptographic Provider 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-2021-31199

Description

Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability

Severity

CVSS 3.1 · CNA5.2 MEDIUM

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

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Affected Products

Vendor	Product	Affected versions
Microsoft	Windows 10 Version 1809	10.0.0 to <10.0.17763.1999
Microsoft	Windows Server 2019	10.0.0 to <10.0.17763.1999
Microsoft	Windows Server 2019 (Server Core installation)	10.0.0 to <10.0.17763.1999
Microsoft	Windows 10 Version 1909	10.0.0 to <10.0.18363.1621
Microsoft	Windows 10 Version 21H1	10.0.0 to <10.0.19043.1052
Microsoft	Windows 10 Version 2004	10.0.0 to <10.0.19041.1052
Microsoft	Windows Server version 2004	10.0.0 to <10.0.19041.1052
Microsoft	Windows 10 Version 20H2	10.0.0 to <10.0.19042.1052
Microsoft	Windows Server version 20H2	10.0.0 to <10.0.19042.1052
Microsoft	Windows 10 Version 1507	10.0.0 to <10.0.10240.18967
Microsoft	Windows 10 Version 1607	10.0.0 to <10.0.14393.4467
Microsoft	Windows Server 2016	10.0.0 to <10.0.14393.4467
Microsoft	Windows Server 2016 (Server Core installation)	10.0.0 to <10.0.14393.4467
Microsoft	Windows 7	6.1.0 to <6.1.7601.25632
Microsoft	Windows 7 Service Pack 1	6.1.0 to <6.1.7601.25632
Microsoft	Windows 8.1	6.3.0 to <6.3.9600.20045 6.3.0 to <6.3.9600.20044
Microsoft	Windows Server 2008 Service Pack 2	6.0.0 to <6.0.6003.21137
Microsoft	Windows Server 2008 Service Pack 2 (Server Core installation)	6.0.0 to <6.0.6003.21137
Microsoft	Windows Server 2008 Service Pack 2	6.0.0 to <6.0.6003.21137
Microsoft	Windows Server 2008 R2 Service Pack 1	6.1.0 to <6.1.7601.25632
Microsoft	Windows Server 2008 R2 Service Pack 1 (Server Core installation)	6.0.0 to <6.1.7601.25632
Microsoft	Windows Server 2012	6.2.0 to <6.2.9200.23372
Microsoft	Windows Server 2012 (Server Core installation)	6.2.0 to <6.2.9200.23372
Microsoft	Windows Server 2012 R2	6.3.0 to <6.3.9600.20045 6.3.0 to <6.3.9600.20044
Microsoft	Windows Server 2012 R2 (Server Core installation)	6.3.0 to <6.3.9600.20045 6.3.0 to <6.3.9600.20044

References

1 Links

Other references

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31199

Record Details

Published

2021-06-08

Last updated

2025-10-21

Assigner (CNA)

microsoft

Credited to

More from Microsoft

CVE-2019-07089.8

Microsoft Remote Desktop Services Remote Code Execution Vulnerability

CVE-2021-344739.1

Microsoft Exchange Server Remote Code Execution Vulnerability

CVE-2025-537709.8

Microsoft SharePoint Server Remote Code Execution Vulnerability

CVE-2021-268559.1

Microsoft Exchange Server Remote Code Execution Vulnerability

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.