boxscore/security
CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-42278HIGH
Microsoft Windows Server 2008 R2 Service Pack 1 — Active Directory Domain Services Elevation of Privilege Vulnerability
  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   L   N  U  H  H  H    7.5   .7021   99.3   YES
AFFECTED
  Product                                                           Versions        Fixed
  Windows Server 2008 R2 Service Pack 1                             6.1.7601.0 –    —
  Windows Server 2008 R2 Service Pack 1 (Server Core installation)  6.1.7601.0 –    —
  Windows Server 2008 Service Pack 2                                6.0.6003.0 –    —
  Windows Server 2008 Service Pack 2 (Server Core installation)     6.0.6003.0 –    —
  Windows Server 2012                                               6.2.9200.0 –    —
  Windows Server 2012 (Server Core installation)                    6.2.9200.0 –    —
  Windows Server 2012 R2                                            6.3.9600.0 –    —
  Windows Server 2012 R2 (Server Core installation)                 6.3.9600.0 –    —
  Windows Server 2016                                               10.0.14393.0 –  —
  Windows Server 2016 (Server Core installation)                    10.0.14393.0 –  —
  + 5 more
TIMELINE
  Oct 12  Reserved by microsoft
  Apr 11  Added to CISA KEV, remediation due 2022-05-02
  Apr 11  Published (CNA: microsoft)
CNA: microsoft · CVSS v3.1 · 3 references · NVD status: Analyzed · KEV due May 2, 2022

Description

Active Directory Domain Services Elevation of Privilege Vulnerability

Lifecycle

Complete event history — 3 events, chronological
DateEventDetail
October 12, 2021ReservedReserved by microsoft
April 11, 2022KEV ADDEDAdded to CISA KEV, remediation due 2022-05-02
April 11, 2022PublishedPublished (CNA: microsoft)

Affected

Affected products and packages — 15 rows
VendorProduct / PackageEcosystemVersion introducedFixed
MicrosoftWindows Server 2008 R2 Service Pack 1—6.1.7601.0—
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)—6.1.7601.0—
MicrosoftWindows Server 2008 Service Pack 2—6.0.6003.0—
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)—6.0.6003.0—
MicrosoftWindows Server 2012—6.2.9200.0—
MicrosoftWindows Server 2012 (Server Core installation)—6.2.9200.0—
MicrosoftWindows Server 2012 R2—6.3.9600.0—
MicrosoftWindows Server 2012 R2 (Server Core installation)—6.3.9600.0—
MicrosoftWindows Server 2016—10.0.14393.0—
MicrosoftWindows Server 2016 (Server Core installation)—10.0.14393.0—
MicrosoftWindows Server 2019—10.0.17763.0—
MicrosoftWindows Server 2019 (Server Core installation)—10.0.17763.0—
MicrosoftWindows Server 2022—10.0.20348.0—
MicrosoftWindows Server version 2004—10.0.0—
MicrosoftWindows Server version 20H2—10.0.0—

References (3)

Related

Authoritative record: CVE-2021-42278 at cve.org

Vendors: microsoft

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-42278 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.