High severity · published Oct 13, 2021
CVE-2021-41357
Win32k Elevation of Privilege Vulnerability
In wildKEV
7.8
CVSS
1.6%
EPSS
Yes
On KEV
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 75% of CVEs
Exploited in the wildYes
CISA KEVListed Apr 25, 2022
Federal remediation dueMay 16, 2022
Ransomware campaign useNot known
Affected products
Which versions
W1
Windows 10 Version 2004 · Microsoft
10.0.0 before 10.0.19041.1288 · source: vendor
W1
Windows 10 Version 20H2 · Microsoft
10.0.0 before 10.0.19042.1288 · source: vendor
W1
Windows 10 Version 21H1 · Microsoft
10.0.0 before 10.0.19043.1288 · source: vendor
W1
Windows 11 version 21H2 · Microsoft
10.0.0 before 10.0.22000.258 · source: vendor
WS
Windows Server 2022 · Microsoft
10.0.0 before 10.0.20348.288 · source: vendor, NVD
WS
Windows Server version 2004 · Microsoft
10.0.0 before 10.0.19041.1288 · source: vendor
WS
Windows Server version 20H2 · Microsoft
10.0.0 before 10.0.19042.1288 · source: vendor
W1
Windows 10 2004 · Microsoft
before 10.0.19041.1288 · source: NVD
W1
Windows 10 20h2 · Microsoft
before 10.0.19042.1288 · source: NVD
W1
Windows 10 21h1 · Microsoft
before 10.0.19043.1288 · source: NVD
W1
Windows 11 21h2 · Microsoft
before 10.0.22000.258 · source: NVD
WS
Windows Server 2004 · Microsoft
before 10.0.19041.1288 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-41357
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-41357
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41357
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