VulnerabilityAnalyzed
CVE-2021-42278
Microsoft Active Directory Domain Services Privilege Escalation Vulnerability
KEVHIGH 7.5EPSS 73.3%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 2 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Active Directory Domain Services Elevation of Privilege Vulnerability
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 73.30% probability · 99th percentile
- CISA KEV
- Listed 11 April 2022 · due 2 May 2022 · used in ransomware campaigns
- Affected
- microsoft/windows server 2004 · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 2022 · microsoft/windows server 20h2
- Source
- secure@microsoft.com
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2021-42278
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42278Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42278Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42278US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.