CVEs / CVE-2021-42278
CVE-2021-42278: Microsoft Active Directory Domain Services Privilege Escalation Vulnerability
- Known exploited in the CISA KEV catalog since 11 Apr 2022
- medium 6.5 CVSS 2.0 (NVD)
- EPSS 73.2% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.
Description
Active Directory Domain Services Elevation of Privilege Vulnerability
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows Server 2008 R2 Service Pack 1 | from 6.1.7601.0, before 6.1.7601.25769 | 6.1.7601.25769 |
| Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) | from 6.1.7601.0, before 6.1.7601.25769 | 6.1.7601.25769 |
| Microsoft Windows Server 2008 Service Pack 2 | from 6.0.6003.0, before 6.0.6003.21282 | 6.0.6003.21282 |
| Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) | from 6.0.6003.0, before 6.0.6003.21282 | 6.0.6003.21282 |
| Microsoft Windows Server 2012 | from 6.2.9200.0, before 6.2.9200.23517 | 6.2.9200.23517 |
| Microsoft Windows Server 2012 (Server Core installation) | from 6.2.9200.0, before 6.2.9200.23517 | 6.2.9200.23517 |
| Microsoft Windows Server 2012 R2 | from 6.3.9600.0, before 6.3.9600.20174 | 6.3.9600.20174 |
| Microsoft Windows Server 2012 R2 (Server Core installation) | from 6.3.9600.0, before 6.3.9600.20174 | 6.3.9600.20174 |
| Microsoft Windows Server 2016 | from 10.0.14393.0, before 10.0.14393.4770 | 10.0.14393.4770 |
| Microsoft Windows Server 2016 (Server Core installation) | from 10.0.14393.0, before 10.0.14393.4770 | 10.0.14393.4770 |
| Microsoft Windows Server 2019 | from 10.0.17763.0, before 10.0.17763.2300 | 10.0.17763.2300 |
| Microsoft Windows Server 2019 (Server Core installation) | from 10.0.17763.0, before 10.0.17763.2300 | 10.0.17763.2300 |
| Microsoft Windows Server 2022 | from 10.0.20348.0, before 10.0.20348.350 | 10.0.20348.350 |
| Microsoft Windows Server version 2004 | from 10.0.0, before 10.0.19041.1348 | 10.0.19041.1348 |
| Microsoft Windows Server version 20H2 | from 10.0.0, before 10.0.19042.1348 | 10.0.19042.1348 |
Exploitation
| In CISA KEV since | 11 Apr 2022 |
|---|---|
| Due date for US federal agencies | 2 May 2022 |
| Used in ransomware campaigns | Known |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 2.0 | 6.5 mediumAV:N/AC:L/Au:S/C:P/I:P/A:PScored by NVD |
|---|
References
- CVE-2021-42278 on NVD
- CVE-2021-42278 in the CISA KEV catalog
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42278 Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42278 Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42278 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.