High severity · published Nov 10, 2021
CVE-2021-42287
Active Directory Domain Services Elevation of Privilege Vulnerability
RansomwareIn wildKEV
7.5
CVSS
77.2%
EPSS
Yes
On KEV
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)77.2% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Apr 11, 2022
Federal remediation dueMay 2, 2022
Ransomware campaign useKnown
Affected products
Which versions
WS
Windows Server 2008 R2 Service Pack 1 · Microsoft
6.1.7601.0 before 6.1.7601.25769 · source: vendor
WS
Windows Server 2008 R2 Service Pack 1 (Server Core installation) · Microsoft
6.1.7601.0 before 6.1.7601.25769 · source: vendor
WS
Windows Server 2008 Service Pack 2 · Microsoft
6.0.6003.0 before 6.0.6003.21282 · source: vendor
WS
Windows Server 2008 Service Pack 2 (Server Core installation) · Microsoft
6.0.6003.0 before 6.0.6003.21282 · source: vendor
WS
Windows Server 2012 · Microsoft
6.2.9200.0 before 6.2.9200.23517 · source: vendor, NVD
WS
Windows Server 2012 (Server Core installation) · Microsoft
6.2.9200.0 before 6.2.9200.23517 · source: vendor
WS
Windows Server 2012 R2 · Microsoft
6.3.9600.0 before 6.3.9600.20174 · source: vendor
WS
Windows Server 2012 R2 (Server Core installation) · Microsoft
6.3.9600.0 before 6.3.9600.20174 · source: vendor
WS
Windows Server 2016 · Microsoft
10.0.14393.0 before 10.0.14393.4770 · source: vendor, NVD
WS
Windows Server 2016 (Server Core installation) · Microsoft
10.0.14393.0 before 10.0.14393.4770 · source: vendor
WS
Windows Server 2019 · Microsoft
10.0.17763.0 before 10.0.17763.2300 · source: vendor, NVD
WS
Windows Server 2019 (Server Core installation) · Microsoft
10.0.17763.0 before 10.0.17763.2300 · source: vendor
Affected product
WS
Windows Server 2008 R2 Service Pack 1
Microsoft
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-42287
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-42287
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42287
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