# Microsoft Windows: An elevation of privilege vulnerability exists in Windows when the Win32k component fails… CVE record · `CVE-2019-0803` - **Identifiers:** `CVE-2019-0803` - **State:** Confirmed - **Severity:** CVSS 7.8 High - **Critical:** Yes: KEV, CVSS 7+ and EPSS - **CNA:** microsoft - **Technologies:** [Microsoft Windows](https://agentprime.io/advisories/technology/microsoft-windows.md) · [Microsoft Windows Server](https://agentprime.io/advisories/technology/microsoft-windows-server.md) - **Published:** 9 Apr 2019 - **Updated:** 21 Oct 2025 - **Reviewed by a person:** No Published by the CVE Program (CNA: microsoft) at 9 Apr 2019, 20:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. ## Critical Critical, because: - In CISA’s KEV catalogue since 3 Nov 2021: it is known to be exploited. - CVSS score 7.8 (7.0 or more) and EPSS 0.45 (0.1 or more): a high score and a real chance of exploitation in the next 30 days. How we decide what’s critical: ## Affected products, as the CNA wrote them - Vendor: Microsoft. Product: 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` - and 8 more - Vendor: Microsoft. Product: 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)` - and 6 more ## Not analysed yet We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter. ## Severity and exploitation - 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from ADP (CISA-ADP) - **CISA KEV:** Listed since 3 Nov 2021: known to be exploited. CISA reports use in ransomware campaigns. - **EPSS:** 0.45, the 98th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline This record came from the full history of the CVE Program, published 9 Apr 2019. New records show when each source confirmed them. ## Sources - [CVE List: CVE-2019-0803](https://www.cve.org/CVERecord?id=CVE-2019-0803) - [NVD: CVE-2019-0803](https://nvd.nist.gov/vuln/detail/CVE-2019-0803) ### References from the CNA - - Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description. ## Check whether this affects you This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run. - With the agentprime MCP server (), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: - As JSON: - Everything that needs attention now: --- The web page: . Everything for agents: .