Windows Win32k Elevation of Privilege Vulnerability
Published 2021-02-25 23:15:14
Updated 2023-12-29 23:15:26
View at NVD,   CVE.org
Vulnerability category: Memory CorruptionGain privilege

CVE-2021-1732 is in the CISA Known Exploited Vulnerabilities Catalog

This issue is known to have been leveraged as part of a ransomware campaign.
CISA vulnerability name:
Microsoft Win32k Privilege Escalation Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
Added on 2021-11-03 Action due date 2021-11-17

Exploit prediction scoring system (EPSS) score for CVE-2021-1732

0.31%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 70 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2021-1732

  • Win32k ConsoleControl Offset Confusion
    Disclosure Date: 2021-02-10
    First seen: 2021-03-18
    exploit/windows/local/cve_2021_1732_win32k
    exploit/windows/local/cve_2021_1732_win32k A vulnerability exists within win32k that can be leveraged by an attacker to escalate privileges to those of NT AUTHORITY\SYSTEM. The flaw exists in how the WndExtra field of a window can be manipulated into being treate
  • Win32k ConsoleControl Offset Confusion
    Disclosure Date: 2021-02-09
    First seen: 2022-12-23
    exploit/windows/local/cve_2022_21882_win32k
    A vulnerability exists within win32k that can be leveraged by an attacker to escalate privileges to those of NT AUTHORITY\SYSTEM. The flaw exists in how the WndExtra field of a window can be manipulated into being treated as an offset despite being populated by a

CVSS scores for CVE-2021-1732

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.6
MEDIUM AV:L/AC:L/Au:N/C:P/I:P/A:P
3.9
6.4
NIST
7.8
HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1.8
5.9
NIST
7.8
HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1.8
5.9
Microsoft Corporation

CWE ids for CVE-2021-1732

  • The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
    Assigned by: nvd@nist.gov (Primary)
  • The product writes data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-1732

Products affected by CVE-2021-1732

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