CVE-2019-0803
High 7.8 Exploited in the wild (KEV) Used in ransomware campaigns
Confirmed active exploitation — CISA KEV catalog
- Name
- Microsoft Win32k Privilege Escalation Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
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.
Metrics
- CVSS 3.1
-
7.8 (HIGH)
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 45% (percentile: 99) as of 2 November 2026
Affected products
microsoft: windows 10 1507; microsoft: windows 10 1607; microsoft: windows 10 1703; microsoft: windows 10 1709; microsoft: windows 10 1803; microsoft: windows 10 1809; microsoft: windows 7; microsoft: windows 8.1; microsoft: windows rt 8.1; microsoft: windows server 1709; microsoft: windows server 1803; microsoft: windows server 2008; microsoft: windows server 2012; microsoft: windows server 2016; microsoft: windows server 2019
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0803 PatchVendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0803 PatchVendor Advisory
- http://packetstormsecurity.com/files/153034/Microsoft-Windows-Win32k-Privilege-… Third Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/153034/Microsoft-Windows-Win32k-Privilege-… Third Party AdvisoryVDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019… US Government Resource