VulnerabilityAnalyzed
CVE-2021-31199
Microsoft Enhanced Cryptographic Provider Privilege Escalation Vulnerability
KEVMEDIUM 5.2EPSS 2.95%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 17 November 2021). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability
- CVSS 3.1
- 5.2 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- EPSS
- 2.95% probability · 86th percentile
- CISA KEV
- Listed 3 November 2021 · due 17 November 2021
- Affected
- microsoft/windows 10 1507 · microsoft/windows 10 1607 · microsoft/windows 10 1809 · microsoft/windows 10 1909 · microsoft/windows 10 2004 · microsoft/windows 10 20h2 · microsoft/windows 10 21h1 · microsoft/windows 7 · microsoft/windows 8.1 · microsoft/windows rt 8.1 · microsoft/windows server 2004 · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 20h2
- Source
- secure@microsoft.com
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2021-31199
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31199Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31199Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31199US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.