Microsoft Windows Server 2008 R2 Service Pack 1

CVE-2021-42287

HIGH 7.5CISA KEV ↗Exploited per ENISA since 2022-04-11

At a glance

Source: NVD
EPSS: EPSS 77.17 % · percentile 100 (2026-10-29)
State: PUBLISHED
Published: 2021-11-10 00:47 UTC
Updated: 2026-08-19 16:27 UTC
Assigner: microsoft
NVD status: Analyzed

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Description

Active Directory Domain Services Elevation of Privilege Vulnerability

References

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · secure@microsoft.com (Secondary)
CVSS 3.1	HIGH 8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Secondary)
CVSS 2.0	MEDIUM 6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2021-29262
GCVE · GCVE-0-2021-42287

CERT-FR advisories

CERTFR-2021-AVI-862 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:* < 10.0.19041.1348
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* < 10.0.14393.4770
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* < 10.0.17763.2300
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* < 10.0.20348.350
cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:* < 10.0.19042.1348

Affected products

Product	Versions
Microsoft · Windows Server 2008 R2 Service Pack 1	affected 6.1.7601.0 < 6.1.7601.25769
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)	affected 6.1.7601.0 < 6.1.7601.25769
Microsoft · Windows Server 2008 Service Pack 2	affected 6.0.6003.0 < 6.0.6003.21282
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)	affected 6.0.6003.0 < 6.0.6003.21282
Microsoft · Windows Server 2012	affected 6.2.9200.0 < 6.2.9200.23517
Microsoft · Windows Server 2012 (Server Core installation)	affected 6.2.9200.0 < 6.2.9200.23517
Microsoft · Windows Server 2012 R2	affected 6.3.9600.0 < 6.3.9600.20174
Microsoft · Windows Server 2012 R2 (Server Core installation)	affected 6.3.9600.0 < 6.3.9600.20174
Microsoft · Windows Server 2016	affected 10.0.14393.0 < 10.0.14393.4770
Microsoft · Windows Server 2016 (Server Core installation)	affected 10.0.14393.0 < 10.0.14393.4770
Microsoft · Windows Server 2019	affected 10.0.17763.0 < 10.0.17763.2300
Microsoft · Windows Server 2019 (Server Core installation)	affected 10.0.17763.0 < 10.0.17763.2300
Microsoft · Windows Server 2022	affected 10.0.20348.0 < 10.0.20348.350
Microsoft · Windows Server version 2004	affected 10.0.0 < 10.0.19041.1348
Microsoft · Windows Server version 20H2	affected 10.0.0 < 10.0.19041.1348

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
CISA Known Exploited Vulnerabilities	CC0 1.0
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD