CVEs / CVE-2019-0803
CVE-2019-0803: Microsoft Win32k Privilege Escalation Vulnerability
- Known exploited in the CISA KEV catalog since 3 Nov 2021
- high 7.8 CVSS 3.1 (NVD)
- EPSS 45.2% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Microsoft Win32k contains an unspecified vulnerability due to it failing to properly handle objects in memory causing privilege escalation. Successful exploitation allows an attacker to run code in kernel mode.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows | 7 for 32-bit Systems Service Pack 1 | — |
| Microsoft Windows | 7 for x64-based Systems Service Pack 1 | — |
| Microsoft Windows | 8.1 for 32-bit systems | — |
| Microsoft Windows | 8.1 for x64-based systems | — |
| Microsoft Windows | RT 8.1 | — |
| Microsoft Windows | 10 for 32-bit Systems | — |
| Microsoft Windows | 10 for x64-based Systems | — |
| Microsoft Windows | 10 Version 1607 for 32-bit Systems | — |
| Microsoft Windows | 10 Version 1607 for x64-based Systems | — |
| Microsoft Windows | 10 Version 1703 for 32-bit Systems | — |
| Microsoft Windows | 10 Version 1703 for x64-based Systems | — |
| Microsoft Windows | 10 Version 1709 for 32-bit Systems | — |
| Microsoft Windows | 10 Version 1709 for x64-based Systems | — |
| Microsoft Windows | 10 Version 1803 for 32-bit Systems | — |
| Microsoft Windows | 10 Version 1803 for x64-based Systems | — |
| Microsoft Windows | 10 Version 1803 for ARM64-based Systems | — |
| Microsoft Windows | 10 Version 1809 for 32-bit Systems | — |
| Microsoft Windows | 10 Version 1809 for x64-based Systems | — |
| Microsoft Windows | 10 Version 1809 for ARM64-based Systems | — |
| Microsoft Windows | 10 Version 1709 for ARM64-based Systems | — |
| Microsoft Windows Server | 2008 R2 for x64-based Systems Service Pack 1 (Core installation) | — |
| Microsoft Windows Server | 2008 R2 for Itanium-Based Systems Service Pack 1 | — |
| Microsoft Windows Server | 2008 R2 for x64-based Systems Service Pack 1 | — |
| Microsoft Windows Server | 2008 for 32-bit Systems Service Pack 2 (Core installation) | — |
| Microsoft Windows Server | 2012 | — |
| Microsoft Windows Server | 2012 (Core installation) | — |
| Microsoft Windows Server | 2012 R2 | — |
| Microsoft Windows Server | 2012 R2 (Core installation) | — |
| Microsoft Windows Server | 2016 | — |
| Microsoft Windows Server | 2016 (Core installation) | — |
Exploitation
| In CISA KEV since | 3 Nov 2021 |
|---|---|
| Due date for US federal agencies | 3 May 2022 |
| Used in ransomware campaigns | Known |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|
References
- CVE-2019-0803 on NVD
- CVE-2019-0803 in the CISA KEV catalog
- http://packetstormsecurity.com/files/153034/Microsoft-Windows-Win32k-Privilege-Escalation.html Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0803 Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-0803 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.