CVE DATABASE / CVE-2019-0803
CVE-2019-0803
Microsoft Win32k Privilege Escalation Vulnerability
CVSS 7.8 · HIGH
⚠ CISA KEV — ACTIVELY EXPLOITED
On the CISA KEV catalog
Confirmed exploited in the wild. Added 2021-11-03.
Federal remediation due 2022-05-03.
Required action: Apply updates per vendor instructions.
Summary
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.
CVSS 3.1 breakdown
| Base score | 7.8 (HIGH) |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Attack vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity | HIGH |
| Availability | HIGH |
Affected products
Microsoft windows 10 1507Microsoft windows 10 1607Microsoft windows 10 1703Microsoft windows 10 1709Microsoft windows 10 1803Microsoft windows 10 1809Microsoft windows 7Microsoft windows 8.1Microsoft windows rt 8.1Microsoft windows server 1709Microsoft windows server 1803Microsoft windows server 2008Microsoft windows server 2012Microsoft windows server 2016Microsoft windows server 2019
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References
- http://packetstormsecurity.com/files/153034/Microsoft-Windows-Win32k-Privilege-Escalation.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0803
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-0803
Data: NIST NVD + CISA KEV. NVD last modified 2025-10-29. Always verify against the vendor advisory before acting.