CVEvulnerability

CVE-2021-31979

7.8 HIGH Known exploited Published 2021-07-14 Modified 2026-08-10 Official page ↗

CISA Known Exploited Vulnerability

Microsoft Windows Kernel Privilege Escalation Vulnerability — Microsoft Windows

Microsoft Windows kernel contains an unspecified vulnerability that allows for privilege escalation.

Added to KEV: 2021-11-03
Remediation due: 2021-11-17
Ransomware use: Unknown
Required action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2021-31979

Status: Analyzed
Published: 2021-07-14
Last modified: 2026-08-10
Assigner: [email protected]
CVSS 3.1 ([email protected]): 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected]): 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected]): 7.2 HIGH — AV:L/AC:L/Au:N/C:C/I:C/A:C
Weaknesses: CWE-119

Description

Windows Kernel Elevation of Privilege Vulnerability

Affected configurations

• microsoft windows 10 1507 (< 10.0.10240.19003) • microsoft windows 10 1607 (< 10.0.14393.4530) • microsoft windows 10 1809 (< 10.0.17763.2061) • microsoft windows 10 1909 (< 10.0.18363.1679) • microsoft windows 10 2004 (< 10.0.19041.1110) • microsoft windows 10 20h2 (< 10.0.19042.1110) • microsoft windows 10 21h1 (< 10.0.19043.1110) • microsoft windows 7 • microsoft windows 8.1 • microsoft windows rt 8.1 • microsoft windows server 2004 (< 10.0.19041.1110) • microsoft windows server 2008 • microsoft windows server 2008 r2 • microsoft windows server 2012 • microsoft windows server 2012 r2 • microsoft windows server 2016 (< 10.0.14393.4530) • microsoft windows server 2019 (< 10.0.17763.2061) • microsoft windows server 20h2 (< 10.0.19042.1110)

Weakness · CWE (1)

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer weakness

References