VulnTideExploited vulnerabilities, by vendor. Data as of 28 Oct 2026.
Known exploitedIn CISA's KEV catalog since 10 January 2022Ransomware use: known
Microsoft Win32k

CVE-2019-1458: Microsoft Win32k Privilege Escalation Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 10 Jan 2022, 762 days after the CVE record was published.

How likely is exploitation in the next 30 days?
74.4%

EPSS score, percentile 99.5 of all scored records

How severe?
7.8 High

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

Required action (CISA), due 10 Jul 2022: Apply updates per vendor instructions.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected: 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; 2012 (Core installation)

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

Apply updates per vendor instructions.

CISA due date for this action: 10 July 2022.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

Affected products and versions

As listed in the CVE record.

Microsoft Windows
StatusVersions
Affected10 for 32-bit Systems
Affected10 for x64-based Systems
Affected10 Version 1607 for 32-bit Systems
Affected10 Version 1607 for x64-based Systems
Affected7 for 32-bit Systems Service Pack 1
Affected7 for x64-based Systems Service Pack 1
Affected8.1 for 32-bit systems
Affected8.1 for x64-based systems
AffectedRT 8.1
Microsoft Windows Server
StatusVersions
Affected2016
Affected2016 (Core installation)
Affected2008 for 32-bit Systems Service Pack 2
Affected2008 for 32-bit Systems Service Pack 2 (Core installation)
Affected2008 for Itanium-Based Systems Service Pack 2
Affected2008 for x64-based Systems Service Pack 2
Affected2008 for x64-based Systems Service Pack 2 (Core installation)
Affected2008 R2 for Itanium-Based Systems Service Pack 1
Affected2008 R2 for x64-based Systems Service Pack 1
Affected2008 R2 for x64-based Systems Service Pack 1 (Core installation)
Affected2012
Affected2012 (Core installation)

And 2 more version entries in the CVE record.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

A privilege escalation vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k EoP.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

  • CISA added CVE-2019-1458 to its Known Exploited Vulnerabilities (KEV) catalog on 10 Jan 2022.
  • CISA marks it as known to be used in ransomware campaigns.
  • The due date CISA sets for the required action is 10 Jul 2022.
  • The CVE record was published on 10 Dec 2019, 762 days before it was added to KEV.
  • The CVE record carries a CVSS v3.1 base score of 7.8 (High), taken from CISA's enrichment of the record.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 74.4% (percentile 99.5), as of 28 Oct 2026.
  • CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

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'.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Timeline

DateEvent
10 Dec 2019CVE record published
10 Jan 2022Added to CISA KEV
10 Jul 2022CISA due date for the required action
12 Aug 2026CVE record last updated

References

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