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CVE-2021-31955: Microsoft Windows Kernel Information Disclosure Vulnerability
Microsoft Windows · in CISA KEV since 2021-11-03
2021-11-03added to KEV
2021-11-17federal remediation due date
81.11%EPSS exploit probability (30 days) 99.6th percentile
5.5 MEDIUMCVSS 3.1
Unknownknown ransomware use
148days from NVD publication to KEV
What it is
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.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-497 |
|---|---|
| CVSS vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD published | 2021-06-08 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-31955.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.