CVEvulnerability

CVE-2021-1732

7.8 HIGH Known exploited Published 2021-02-25 Modified 2026-08-12 Official page ↗

CISA Known Exploited Vulnerability

Microsoft Win32k Privilege Escalation Vulnerability — Microsoft Win32k

Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.

Added to KEV: 2021-11-03
Remediation due: 2021-11-17
Ransomware use: Known
Required action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2021-1732

Status: Analyzed
Published: 2021-02-25
Last modified: 2026-08-12
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 2.0 ([email protected]): 4.6 MEDIUM — AV:L/AC:L/Au:N/C:P/I:P/A:P
Weaknesses: CWE-787

Description

Windows Win32k Elevation of Privilege Vulnerability

Affected configurations

• microsoft windows 10 1803 • microsoft windows 10 1809 • microsoft windows 10 1909 • microsoft windows 10 2004 • microsoft windows 10 20h2 • microsoft windows server 1909 • microsoft windows server 2004 • microsoft windows server 2019 • microsoft windows server 20h2

Weakness · CWE (1)

CWE-787 Out-of-bounds Write weakness

References