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CVE-2019-0803

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka…

High7.8Known exploitedEPSS 45.2%
Published
Updated
Reserved
Assigned by
microsoft

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'. This CVE ID is unique from CVE-2019-0685, CVE-2019-0859.

Exploited in the wild

CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Microsoft Win32k Privilege Escalation Vulnerability.

Added
3 Nov 2021
Fix due (US federal)
3 May 2022
Used by ransomware
Known

Apply updates per vendor instructions.

Scores

CVSS scores of CVE-2019-0803, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Analyzed3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
45.2% · top 1.2% of all CVEs (2 Nov 2026)
CISA SSVC
Exploitation: active · Automatable: no · Technical impact: total

Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

  • Elevation of Privilege
  • CWE-noinfo Not enough information

Affected products

  • Microsoft · Windows

    • affected 7 for 32-bit Systems Service Pack 1
    • affected 7 for x64-based Systems Service Pack 1
    • affected 8.1 for 32-bit systems
    • affected 8.1 for x64-based systems
    • affected RT 8.1
    • affected 10 for 32-bit Systems
    • affected 10 for x64-based Systems
    • affected 10 Version 1607 for 32-bit Systems
    • affected 10 Version 1607 for x64-based Systems
    • affected 10 Version 1703 for 32-bit Systems
    • affected 10 Version 1703 for x64-based Systems
    • affected 10 Version 1709 for 32-bit Systems
    • affected 10 Version 1709 for x64-based Systems
    • affected 10 Version 1803 for 32-bit Systems
    • affected 10 Version 1803 for x64-based Systems
    • affected 10 Version 1803 for ARM64-based Systems
    • affected 10 Version 1809 for 32-bit Systems
    • affected 10 Version 1809 for x64-based Systems
    • affected 10 Version 1809 for ARM64-based Systems
    • affected 10 Version 1709 for ARM64-based Systems

  • Microsoft · Windows Server

    • affected 2008 R2 for x64-based Systems Service Pack 1 (Core installation)
    • affected 2008 R2 for Itanium-Based Systems Service Pack 1
    • affected 2008 R2 for x64-based Systems Service Pack 1
    • affected 2008 for 32-bit Systems Service Pack 2 (Core installation)
    • affected 2012
    • affected 2012 (Core installation)
    • affected 2012 R2
    • affected 2012 R2 (Core installation)
    • affected 2016
    • affected 2016 (Core installation)
    • affected version 1709 (Core Installation)
    • affected version 1803 (Core Installation)
    • affected 2019
    • affected 2019 (Core installation)
    • affected 2008 for Itanium-Based Systems Service Pack 2
    • affected 2008 for 32-bit Systems Service Pack 2
    • affected 2008 for x64-based Systems Service Pack 2
    • affected 2008 for x64-based Systems Service Pack 2 (Core installation)

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .