CVE-2021-42278: Microsoft Active Directory Domain Services Privilege Escalation Vulnerability

CVE-2021-42278 · Severity: critical · CVSS 7.5 · Exploited in the wild · Published 2022-04-11

Microsoft Active Directory Domain Services contains an elevation of privilege vulnerability. An authenticated attacker can exploit this flaw to escalate privileges within a domain environment. This vulnerability has been observed being exploited in the wild.

Technologies: Microsoft Active Directory. Vendors: Microsoft.

Quick answers

Is CVE-2021-42278 exploited in the wild?
Yes. CVE-2021-42278 is known to be exploited in the wild, first recorded on 11 April 2022. Treat it as urgent.
How severe is CVE-2021-42278?
Critical severity, with a CVSS score of 7.5, published 11 April 2022.
Which products and versions are affected?
Microsoft Windows Server 2008 SP2, R2 SP1; Microsoft Windows Server 2012 R2; Microsoft Windows Server 2016 up to (excluding) 10.0.14393.4770; Microsoft Windows Server 2019 up to (excluding) 10.0.17763.2300; and 3 more.
Is there a fix for CVE-2021-42278?
A patch was published on 2022-05-02: Due date for remediation per CISA BOD 22-01 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2021-42278 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2021-42278?
Check whether you run Microsoft Active Directory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Microsoft Windows Server 2008 SP2, R2 SP1
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2016 up to (excluding) 10.0.14393.4770
  • Microsoft Windows Server 2019 up to (excluding) 10.0.17763.2300
  • Microsoft Windows Server 2022 up to (excluding) 10.0.20348.350
  • Microsoft Windows Server 2004 up to (excluding) 10.0.19041.1348
  • Microsoft Windows Server 20H2 up to (excluding) 10.0.19042.1348

Timeline

  • 2021-11-09: disclosed: NVD Published Date
  • 2022-04-11: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2022-05-02: patched: Due date for remediation per CISA BOD 22-01

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