CVE-2021-42278 (GCVE-0-2021-42278)

Vulnerability from cvelistv5 – Published: 2021-11-10 00:47 – Updated: 2025-10-21 23:25
Title
Active Directory Domain Services Elevation of Privilege Vulnerability
Summary
Active Directory Domain Services Elevation of Privilege Vulnerability
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows Server 2019 Affected: 10.0.0 , < 10.0.17763.2300 (custom)
    cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2300:*:*:*:*:*:*:*
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Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.0 , < 10.0.17763.2300 (custom)
    cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2300:*:*:*:*:*:*:*
Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.0 , < 10.0.20348.350 (custom)
    cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.350:*:*:*:*:*:*:*
Create a notification for this product.
Microsoft Windows Server version 2004 Affected: 10.0.0 , < 10.0.19041.1348 (custom)
    cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1348:*:*:*:*:*:*:*
Create a notification for this product.
Microsoft Windows Server version 20H2 Affected: 10.0.0 , < 10.0.19042.1348 (custom)
    cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1348:*:*:*:*:*:*:*
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Microsoft Windows Server 2016 Affected: 10.0.0 , < 10.0.14393.4770 (custom)
    cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4770:*:*:*:*:*:*:*
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Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.0 , < 10.0.14393.4770 (custom)
    cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4770:*:*:*:*:*:*:*
Create a notification for this product.
Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.0 , < 6.0.6003.21282 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21282:*:*:*:*:*:x64:*
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Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.0 , < 6.0.6003.21282 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21282:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21282:*:*:*:*:*:x86:*
Create a notification for this product.
Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.0 , < 6.0.6003.21282 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21282:*:*:*:*:*:x86:*
Create a notification for this product.
Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.0 , < 6.1.7601.25769 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25769:*:*:*:*:*:x64:*
Create a notification for this product.
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.0.0 , < 6.1.7601.25769 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25769:*:*:*:*:*:x64:*
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Microsoft Windows Server 2012 Affected: 6.2.0 , < 6.2.9200.23517 (custom)
    cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23517:*:*:*:*:*:x64:*
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Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.0 , < 6.2.9200.23517 (custom)
    cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23517:*:*:*:*:*:x64:*
Create a notification for this product.
Microsoft Windows Server 2012 R2 Affected: 6.3.0 , < 6.3.9600.20174 (custom)
    cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20174:*:*:*:*:*:x64:*
Create a notification for this product.
Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.0 , < 6.3.9600.20174 (custom)
    cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20174:*:*:*:*:*:x64:*
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Date Public
2021-11-09 08:00
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2021-42278

Status: Confirmed

Status Updated: 2022-04-11 00:00 UTC

Exploited: Yes


Timestamps
First Seen: 2022-04-11
Asserted: 2022-04-11

Scope
Notes: KEV entry: Microsoft Active Directory Domain Services Privilege Escalation Vulnerability | Affected: Microsoft / Active Directory | Description: Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation. | Required action: Apply updates per vendor instructions. | Due date: 2022-05-02 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-42278

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev


Details
Cwes CWE-20
Feed CISA Known Exploited Vulnerabilities Catalog
Product Active Directory
Due Date 2022-05-02
Date Added 2022-04-11
Vendorproject Microsoft
Vulnerabilityname Microsoft Active Directory Domain Services Privilege Escalation Vulnerability
Knownransomwarecampaignuse Known

References

Created: 2026-02-02 12:27 UTC | Updated: 2026-02-06 07:17 UTC
KEVintel KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2021-42278

Status: Confirmed

Status Updated: 2022-04-11 00:00 UTC

Exploited: Yes


Timestamps
First Seen: 2022-04-11
Asserted: 2022-04-11

Scope
Notes: KEVIntel entry: Active Directory Domain Services Elevation of Privilege Vulnerability | Affected: Microsoft / Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server version 2004, Windows Server version 20H2, Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2008 Service Pack 2, Windows Server 2008 Service Pack 2 (Server Core installation), Windows Server 2008 Service Pack 2, Windows Server 2008 R2 Service Pack 1, Windows Server 2008 R2 Service Pack 1 (Server Core installation), Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation) | CVSS: 7.5 (HIGH) | Used in malware: yes | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Confirmed Compromise

Confidence: 70%

Source: kevintel


Details
Feed KEVIntel (kevintel.com)
Title Active Directory Domain Services Elevation of Privilege Vulnerability
Vendor Microsoft
Product Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server version 2004, Windows Server version 20H2, Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2008 Service Pack 2, Windows Server 2008 Service Pack 2 (Server Core installation), Windows Server 2008 Service Pack 2, Windows Server 2008 R2 Service Pack 1, Windows Server 2008 R2 Service Pack 1 (Server Core installation), Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation)
Added Date 2022-04-11T00:00:00.000Z
Cvss Score 7.5
Epss Score None
Cvss Severity HIGH
Epss Percentile None
Used In Malware yes
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False

References

Created: 2026-06-19 12:47 UTC | Updated: 2026-06-19 12:47 UTC
Show details on NVD website

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      "id": "CVE-2021-42278",
      "lastModified": "2024-11-21T06:27:30.843",
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    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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