CVE-2021-31167 json
Windows Container Manager Service Elevation of Privilege Vulnerability
published 2021-05-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-18080
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 63%
- public exploits
- 0
- none known
Summary
Windows Container Manager Service Elevation of Privilege Vulnerability
Patch / fix
- Microsoft Windows 10 Version 1809 10.0.17763.1935
- Microsoft Windows Server 2019 10.0.17763.1935
- Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.1935
- Microsoft Windows 10 Version 1909 10.0.18363.1556
- Microsoft Windows Server, version 1909 (Server Core installation) 10.0.18363.1556
- Microsoft Windows 10 Version 2004 10.0.19041.982
- Microsoft Windows Server version 2004 10.0.19041.982
- Microsoft Windows 10 Version 20H2 10.0.19042.982
- Microsoft Windows Server version 20H2 10.0.19042.982
Exploit prediction
1.01% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Microsoft Windows 10 Version 1809
- Microsoft Windows Server 2019
- Microsoft Windows Server 2019 (Server Core installation)
- Microsoft Windows 10 Version 1909
- Microsoft Windows Server, version 1909 (Server Core installation)
- Microsoft Windows 10 Version 2004
- Microsoft Windows Server version 2004
- Microsoft Windows 10 Version 20H2
- Microsoft Windows Server version 20H2
Classification
- Weakness
-
- CWE-732 Incorrect Permission Assignment for Critical Resource
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-31167
patch, vendor-advisory
-
packetstormsecurity.com
/files/162559/Windows-Container-Manager-Service-CmsRpcSrv_MapNamedPipeToContainer-Privilege-Escalation.html
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-31167
- NVD CVE-2021-31167
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.