Vulnerability Details : CVE-2021-42278

Used for ransomware!
Active Directory Domain Services Elevation of Privilege Vulnerability
Published 2021-11-10 01:19:44
Updated 2023-12-28 16:15:55
Source Microsoft Corporation
View at NVD,   CVE.org
Vulnerability category: Input validationGain privilege

CVE-2021-42278 is in the CISA Known Exploited Vulnerabilities Catalog

This issue is known to have been leveraged as part of a ransomware campaign.
CISA vulnerability name:
Microsoft Active Directory Domain Services Privilege Escalation Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.
Added on 2022-04-11 Action due date 2022-05-02

Exploit prediction scoring system (EPSS) score for CVE-2021-42278

Probability of exploitation activity in the next 30 days: 59.91%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 97 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-42278

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
6.5
 MEDIUM AV:N/AC:L/Au:S/C:P/I:P/A:P
8.0
6.4
 NIST
8.8
 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.8
5.9
 NIST
7.5
 HIGH CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
1.6
5.9
 Microsoft Corporation

CWE ids for CVE-2021-42278

  • The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
    Assigned by: nvd@nist.gov (Primary)
  • The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-42278

Products affected by CVE-2021-42278

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