Answer in brief
CVE-2018-8639 records a High severity vulnerability in CVE Program Container. The current sources mark it as known exploited. The current feed maps Microsoft/Windows 10 (generic), Microsoft/Windows 10 Servers (generic), Microsoft/Windows 7 (generic), Microsoft/Windows 8.1 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Microsoft/Windows 10 (generic), Microsoft/Windows 10 Servers (generic), Microsoft/Windows 7 (generic), Microsoft/Windows 8.1 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Microsoft/Windows 10generic | 32-bit Systems || Version 1607 for 32-bit Systems || Version 1607 for x64-based Systems || Version 1703 for 32-bit Systems || Version 1703 for x64-based Systems || Version 1709 for 32-bit Systems || Version 1709 for ARM64-based Systems || Version 1709 for x64-based Systems || Version 1803 for 32-bit Systems || Version 1803 for ARM64-based Systems || Version 1803 for x64-based Systems || Version 1809 for 32-bit Systems || Version 1809 for ARM64-based Systems || Version 1809 for x64-based Systems || x64-based Systems | Not reported |
| Microsoft/Windows 10 Serversgeneric | version 1709 (Server Core Installation) || version 1803 (Server Core Installation) | Not reported |
| Microsoft/Windows 7generic | 32-bit Systems Service Pack 1 || x64-based Systems Service Pack 1 | Not reported |
| Microsoft/Windows 8.1generic | 32-bit systems || x64-based systems | Not reported |
| Microsoft/Windows RT 8.1generic | Windows RT 8.1 | Not reported |
| Microsoft/Windows Server 2008generic | 32-bit Systems Service Pack 2 || 32-bit Systems Service Pack 2 (Server Core installation) || Itanium-Based Systems Service Pack 2 || x64-based Systems Service Pack 2 || x64-based Systems Service Pack 2 (Server Core installation) | Not reported |
| Microsoft/Windows Server 2008 R2generic | Itanium-Based Systems Service Pack 1 || x64-based Systems Service Pack 1 || x64-based Systems Service Pack 1 (Server Core installation) | Not reported |
| Microsoft/Windows Server 2012generic | (Server Core installation) | Not reported |
| Microsoft/Windows Server 2012 R2generic | (Server Core installation) | Not reported |
| Microsoft/Windows Server 2016generic | (Server Core installation) | Not reported |
| Microsoft/Windows Server 2019generic | (Server Core installation) | Not reported |
Published upstream
Dec 12, 2018
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2025
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Mar 3, 2025
Evidence: source:kev:kev:kev:recordAn 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 affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8641.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2018-8639 records a High severity vulnerability in CVE Program Container. The current sources mark it as known exploited. The current feed maps Microsoft/Windows 10 (generic), Microsoft/Windows 10 Servers (generic), Microsoft/Windows 7 (generic), Microsoft/Windows 8.1 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Microsoft/Windows 10 (generic), Microsoft/Windows 10 Servers (generic), Microsoft/Windows 7 (generic), Microsoft/Windows 8.1 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Microsoft/Windows 10generic | 32-bit Systems || Version 1607 for 32-bit Systems || Version 1607 for x64-based Systems || Version 1703 for 32-bit Systems || Version 1703 for x64-based Systems || Version 1709 for 32-bit Systems || Version 1709 for ARM64-based Systems || Version 1709 for x64-based Systems || Version 1803 for 32-bit Systems || Version 1803 for ARM64-based Systems || Version 1803 for x64-based Systems || Version 1809 for 32-bit Systems || Version 1809 for ARM64-based Systems || Version 1809 for x64-based Systems || x64-based Systems | Not reported |
| Microsoft/Windows 10 Serversgeneric | version 1709 (Server Core Installation) || version 1803 (Server Core Installation) | Not reported |
| Microsoft/Windows 7generic | 32-bit Systems Service Pack 1 || x64-based Systems Service Pack 1 | Not reported |
| Microsoft/Windows 8.1generic | 32-bit systems || x64-based systems | Not reported |
| Microsoft/Windows RT 8.1generic | Windows RT 8.1 | Not reported |
| Microsoft/Windows Server 2008generic | 32-bit Systems Service Pack 2 || 32-bit Systems Service Pack 2 (Server Core installation) || Itanium-Based Systems Service Pack 2 || x64-based Systems Service Pack 2 || x64-based Systems Service Pack 2 (Server Core installation) | Not reported |
| Microsoft/Windows Server 2008 R2generic | Itanium-Based Systems Service Pack 1 || x64-based Systems Service Pack 1 || x64-based Systems Service Pack 1 (Server Core installation) | Not reported |
| Microsoft/Windows Server 2012generic | (Server Core installation) | Not reported |
| Microsoft/Windows Server 2012 R2generic | (Server Core installation) | Not reported |
| Microsoft/Windows Server 2016generic | (Server Core installation) | Not reported |
| Microsoft/Windows Server 2019generic | (Server Core installation) | Not reported |
Published upstream
Dec 12, 2018
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2025
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Mar 3, 2025
Evidence: source:kev:kev:kev:recordAn 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 affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8641.
Quoted source text, attributed separately from HOL analysis.