Vulnerability in Microsoft Windows 10 Version 1809
CVE-2021-31955
Windows Kernel Information Disclosure Vulnerability
EPSS: 0.036 (88.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C.
Affected products
- Microsoft Windows 10 Version 1809 — versions 10.0.0
- Microsoft Windows 10 Version 1909 — versions 10.0.0
- Microsoft Windows 10 Version 2004 — versions 10.0.0
- Microsoft Windows 10 Version 20h2 — versions 10.0.0
- Microsoft Windows 10 Version 21h1 — versions 10.0.0
- Microsoft Windows Server 2019 — versions 10.0.0
- Microsoft Windows Server 2019 (Server Core Installation) — versions 10.0.0
- Microsoft Windows Server Version 2004 — versions 10.0.0
- Microsoft Windows Server Version 20h2 — versions 10.0.0
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31955 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-31955?
- CVE-2021-31955 is a medium-severity vulnerability in Microsoft Windows 10 Version 1809. CVSS score: 5.5/10. Published 2021-06-08.
- How severe is CVE-2021-31955?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-31955 known to be exploited?
- Yes. CVE-2021-31955 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 13 public proof-of-concept repositories are indexed.