MEDIUMCVSS v3.1 5.5Actively exploited · CISA KEV since 2021-11-03Vulnerability
CVE-2021-31955
Microsoft Windows Kernel contains an unspecified vulnerability that allows for information disclosure. Successful exploitation allows attackers to read the contents of kernel memory from a user-mode process.
Properties
- Euvd product
- Windows 10 Version 2004, Windows Server version 20H2, Windows 10 Version 20H2, Windows 10 Version 1909, Windows 10 Version 21H1, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows 10 Version 1809, Windows Server version 2004
- Vulnerability name
- Microsoft Windows Kernel Information Disclosure Vulnerability
- First seen
- 2025-10-21T23:25:43+00:00
- Cvss score
- 5.5
- Epss score
- 0.81107
- Last seen
- 2026-10-19T12:00:27+00:00
- Due date
- 2021-11-17
- Euvd assigner
- microsoft
- Retrieved at
- 2026-10-21T01:24:47+00:00
- Exploited euvd since
- 2021-11-03T00:00:00+00:00
- Src batch id
- epss_history-20261020T103617Z-728ddd
- Source url
- https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
- Date added
- 2021-11-03
- Score
- 5.5
- Euvd base score version
- 3.1
- Fetched at
- 2026-10-20T10:36:20+00:00
- Euvd vendor
- Microsoft
- Cvss vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- In Signal since
- initial import (Sep 2026)
- Euvd base score
- 5.5
Related Entities (11)
AFFECTS_PRODUCT (8)
DESCRIBES (1)
HAS_WEAKNESS (1)
INVOLVES (1)
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