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CVE-2021-42278

7.5
HIGHCVSS v3.1 Base Score
94.07%
HIGH RiskEPSS (100th percentile)
KEV
NVD-CWE-noinfo

Active Directory Domain Services Elevation of Privilege Vulnerability

Published: 11/10/2021
Modified: 10/30/2025
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ACTIVELY EXPLOITED IN THE WILD

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability Name:

Microsoft Active Directory Domain Services Privilege Escalation Vulnerability

Vendor / Product:

Microsoft Active Directory

Required Action:

Apply updates per vendor instructions.

Due Date: 5/2/2022(OVERDUE)
Ransomware Campaign Use
Added to KEV:

4/11/2022

Notes:

https://nvd.nist.gov/vuln/detail/CVE-2021-42278

Vulnerability Summary

CVSS v3 Score

7.5HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2 Score

6.5

AV:N/AC:L/Au:S/C:P/I:P/A:P

EPSS Score (Exploitation Probability)

94.07%HIGH Exploitation Risk
100th percentile

This vulnerability has a 94.07% probability of being exploited in the next 30 days, ranking higher than 100% of all scored CVEs.

CWE Classification

NVD-CWE-noinfo

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