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CISA KEV · Known exploitedHigh

CVE-2019-1458

Microsoft Win32k

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'.

CVSS
7.8
EPSS
73.9%
99.4% percentile
CISA KEV
Listed
Published
2019.12.11
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability73.9%
Technical severityCVSS 7.8

Vulnerability overview

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'.

Affected product and versions

Product
Microsoft Win32k
Affected versions
10 for 32-bit Systems, 10 for x64-based Systems, 10 Version 1607 for 32-bit Systems, 10 Version 1607 for x64-based Systems, 7 for 32-bit Systems Service Pack 1, 7 for x64-based Systems Service Pack 1, 8.1 for 32-bit systems, 8.1 for x64-based systems, RT 8.1, 2016, 2016 (Core installation), 2008 for 32-bit Systems Service Pack 2, 2008 for 32-bit Systems Service Pack 2 (Core installation), 2008 for Itanium-Based Systems Service Pack 2, 2008 for x64-based Systems Service Pack 2, 2008 for x64-based Systems Service Pack 2 (Core installation), 2008 R2 for Itanium-Based Systems Service Pack 1, 2008 R2 for x64-based Systems Service Pack 1, 2008 R2 for x64-based Systems Service Pack 1 (Core installation), 2012
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2022.07.10
  1. 1
    Identify

    Confirm that Microsoft Win32k and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available
KEV added
2022.01.10
Ransomware use
확인됨
CVE-2019-1458 — Microsoft Win32k | SECUFOCUS NOW