CVE-2021-31199
Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability
Microsoft Enhanced Cryptographic Provider Privilege Escalation Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
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/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:F/RL:O/RC:CExploitation Context
as of October 14, 2026- CISA added CVE-2021-31199 to the KEV catalog 148 days after its CVE record was published.
- It is one of 391 Microsoft entries in the CISA KEV catalog, and one of 83 added in 2021.
- Its current EPSS score (3.0%) is higher than that of 12% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Microsoft Windows 10 Version 1809 | 10.0.0 to <10.0.17763.1999 |
| Microsoft | Microsoft Windows Server 2019 | 10.0.0 to <10.0.17763.1999 |
| Microsoft | Microsoft Windows Server 2019 (Server Core installation) | 10.0.0 to <10.0.17763.1999 |
| Microsoft | Microsoft Windows 10 Version 1909 | 10.0.0 to <10.0.18363.1621 |
| Microsoft | Microsoft Windows 10 Version 21H1 | 10.0.0 to <10.0.19043.1052 |
| Microsoft | Microsoft Windows 10 Version 2004 | 10.0.0 to <10.0.19041.1052 |
| Microsoft | Microsoft Windows Server version 2004 | 10.0.0 to <10.0.19041.1052 |
| Microsoft | Microsoft Windows 10 Version 20H2 | 10.0.0 to <10.0.19042.1052 |
| Microsoft | Microsoft Windows Server version 20H2 | 10.0.0 to <10.0.19042.1052 |
| Microsoft | Microsoft Windows 10 Version 1507 | 10.0.0 to <10.0.10240.18967 |
| Microsoft | Microsoft Windows 10 Version 1607 | 10.0.0 to <10.0.14393.4467 |
| Microsoft | Microsoft Windows Server 2016 | 10.0.0 to <10.0.14393.4467 |
| Microsoft | Microsoft Windows Server 2016 (Server Core installation) | 10.0.0 to <10.0.14393.4467 |
| Microsoft | Microsoft Windows 7 | 6.1.0 to <6.1.7601.25632 |
| Microsoft | Microsoft Windows 7 Service Pack 1 | 6.1.0 to <6.1.7601.25632 |
| Microsoft | Microsoft Windows 8.1 | 6.3.0 to <6.3.9600.20045 6.3.0 to <6.3.9600.20044 |
| Microsoft | Microsoft Windows Server 2008 Service Pack 2 | 6.0.0 to <6.0.6003.21137 |
| Microsoft | Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) | 6.0.0 to <6.0.6003.21137 |
| Microsoft | Microsoft Windows Server 2008 Service Pack 2 | 6.0.0 to <6.0.6003.21137 |
| Microsoft | Microsoft Windows Server 2008 R2 Service Pack 1 | 6.1.0 to <6.1.7601.25632 |
| Microsoft | Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.0.0 to <6.1.7601.25632 |
| Microsoft | Microsoft Windows Server 2012 | 6.2.0 to <6.2.9200.23372 |
| Microsoft | Microsoft Windows Server 2012 (Server Core installation) | 6.2.0 to <6.2.9200.23372 |
| Microsoft | Microsoft Windows Server 2012 R2 | 6.3.0 to <6.3.9600.20045 6.3.0 to <6.3.9600.20044 |
| Microsoft | 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 LinksRecord Details
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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.