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CVE-2021-31956

Severity
HIGH
CVSS
7.8
EPSS
0.20268
Risk score
63.29
CISA KEV
Yes
PoC
No
Published
2021-06-08
Modified
2026-01-12
First seen
2026-08-07
Aliases
EUVD-2021-18829, GHSA-JJ4Q-6C47-CGGX
Products
Microsoft:Windows, Microsoft:Windows 10 Version 1507 10.0.0 <10.0.10240.18967, Microsoft:Windows 10 Version 1607 10.0.0 <10.0.14393.4467, Microsoft:Windows 10 Version 1809 10.0.0 <10.0.17763.1999, Microsoft:Windows 10 Version 1909 10.0.0 <10.0.18363.1621, Microsoft:Windows 10 Version 2004 10.0.0 <10.0.19041.1052, Microsoft:Windows 10 Version 20H2 10.0.0 <10.0.19042.1052, Microsoft:Windows 10 Version 21H1 10.0.0 <10.0.19043.1052, Microsoft:Windows 7 6.1.0 <6.1.7601.25632, Microsoft:Windows 7 Service Pack 1 6.1.0 <6.1.7601.25632, Microsoft:Windows 8.1 6.3.0 <6.3.9600.20044, Microsoft:Windows 8.1 6.3.0 <6.3.9600.20045, Microsoft:Windows Server 2008 Service Pack 2 6.0.0 <6.0.6003.21137, Microsoft:Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.0.0 <6.1.7601.25632, Microsoft:Windows Server 2008 R2 Service Pack 1 6.1.0 <6.1.7601.25632, Microsoft:Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.0 <6.0.6003.21137, Microsoft:Windows Server 2008 Service Pack 2 6.0.0 <6.0.6003.21137, Microsoft:Windows Server 2012 (Server Core installation) 6.2.0 <6.2.9200.23372, Microsoft:Windows Server 2012 6.2.0 <6.2.9200.23372, Microsoft:Windows Server 2012 R2 (Server Core installation) 6.3.0 <6.3.9600.20044, Microsoft:Windows Server 2012 R2 (Server Core installation) 6.3.0 <6.3.9600.20045, Microsoft:Windows Server 2012 R2 6.3.0 <6.3.9600.20044, Microsoft:Windows Server 2012 R2 6.3.0 <6.3.9600.20045, Microsoft:Windows Server 2016 (Server Core installation) 10.0.0 <10.0.14393.4467, Microsoft:Windows Server 2016 10.0.0 <10.0.14393.4467, Microsoft:Windows Server 2019 (Server Core installation) 10.0.0 <10.0.17763.1999, Microsoft:Windows Server 2019 10.0.0 <10.0.17763.1999, Microsoft:Windows Server version 2004 10.0.0 <10.0.19041.1052, Microsoft:Windows Server version 20H2 10.0.0 <10.0.19042.1052
Sources
euvd EUVD-2021-18829
cisa.gov CVE-2021-31956

Description

Windows NTFS Elevation of Privilege Vulnerability

References