CVE-2021-31961

EUVD-2021-18833
Windows InstallService Elevation of Privilege Vulnerability
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.1 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
microsoftCNA
6.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H/E:U/RL:O/RC:C
Base Score
CVSS 3.x
EPSS Score
Percentile: 54%
Affected Products (NVD)
VendorProductVersion
microsoftwindows_server_2019
-
𝑥
= Vulnerable software versions
Windows Releases
Platform
Version
Windows 10
1809 (arm64, x64, x86)
KB5004244
1909 (arm64, x64, x86)
KB5004245
2004 (arm64, x64, x86)
KB5004237
20H2 (arm64, x64, x86)
KB5004237
21H1 (arm64, x64, x86)
KB5004237
Windows Server
2004 Server Core
KB5004237
20H2 Server Core
KB5004237
Windows Server 2019
Server Core
KB5004244
Standard
KB5004244
Common Weakness Enumeration
References
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31961
https://www.zerodayinitiative.com/advisories/ZDI-21-818/
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31961
https://www.zerodayinitiative.com/advisories/ZDI-21-818/