All vulnerabilities
CVE-2021-1732

Microsoft Win32k Privilege Escalation Vulnerability

Microsoft Win32kOperating systems
Open in ThreatlineRecord JSON
CVSS
7.8High
ExploitationExploited in the wildAdded to KEV 3 Nov 2021. Known ransomware useCISA KEV
Exploit odds (EPSS)78.4%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline17 Nov 2021Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 9 Feb 2021Exploit code publicMetasploit
  2. 25 Feb 2021, 23:01 UTCPublishedCVE List
  3. 3 Nov 2021Added to CISA KEVCISA KEV

Public exploit code and templates 1

  • Exploit moduleWin32k ConsoleControl Offset Confusion 9 Feb 2021Metasploit

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

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

Text from CVE List

Affected versions 10

  • Windows 10 Version 1803affected: 10.0.0 before publicationCVE List
  • Windows 10 Version 1809affected: 10.0.0 before publicationCVE List
  • Windows Server 2019affected: 10.0.0 before publicationCVE List
  • Windows Server 2019 (Server Core installation)affected: 10.0.0 before publicationCVE List
  • Windows 10 Version 1909affected: 10.0.0 before publicationCVE List
  • Windows Server, version 1909 (Server Core installation)affected: 10.0.0 before publicationCVE List
  • Windows 10 Version 2004affected: 10.0.0 before publicationCVE List
  • Windows Server version 2004affected: 10.0.0 before publicationCVE List
  • Windows 10 Version 20H2affected: 10.0.0 before publicationCVE List
  • Windows Server version 20H2affected: 10.0.0 before publicationCVE List

References 3