An elevation of privilege vulnerability exists in Windows when the Win32k component fails…
Priority CRITICAL 96Exploited in the wildCWE-404Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-404.
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 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.
Why it matters now
Exploitation Active In CISA KEV since 2025-03-03CISA due date 2025-03-24Known ransomware use
EPSS 0.22349 97th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Active
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Windows 7 | 32-bit Systems Service Pack 1; x64-based Systems Service Pack 1 | — | No fix listed | CNA |
| Microsoft | Windows Server 2012 R2 | (Server Core installation) | — | No fix listed | CNA |
| Microsoft | Windows RT 8.1 | Windows RT 8.1 | — | No fix listed | CNA |
| Microsoft | Windows Server 2008 | 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) | — | No fix listed | CNA |
| Microsoft | Windows Server 2019 | (Server Core installation) | — | No fix listed | CNA |
| Microsoft | Windows Server 2012 | (Server Core installation) | — | No fix listed | CNA |
| Microsoft | Windows 8.1 | 32-bit systems; x64-based systems | — | No fix listed | CNA |
| Microsoft | Windows Server 2016 | (Server Core installation) | — | No fix listed | CNA |
| Microsoft | Windows Server 2008 R2 | Itanium-Based Systems Service Pack 1; x64-based Systems Service Pack 1; x64-based Systems Service Pack 1 (Server Core installation) | — | No fix listed | CNA |
| Microsoft | Windows 10 | 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 | — | No fix listed | CNA |
| Microsoft | Windows 10 Servers | version 1709 (Server Core Installation); version 1803 (Server Core Installation) | — | No fix listed | CNA |
- Windows 7 VendorMicrosoft Affected 32-bit Systems Service Pack 1; x64-based Systems Service Pack 1 Fixed in — No fix listed CNA
- Windows Server 2012 R2 VendorMicrosoft Affected (Server Core installation) Fixed in — No fix listed CNA
- Windows RT 8.1 VendorMicrosoft Affected Windows RT 8.1 Fixed in — No fix listed CNA
- Windows Server 2008 VendorMicrosoft Affected 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) Fixed in — No fix listed CNA
- Windows Server 2019 VendorMicrosoft Affected (Server Core installation) Fixed in — No fix listed CNA
- Windows Server 2012 VendorMicrosoft Affected (Server Core installation) Fixed in — No fix listed CNA
- Windows 8.1 VendorMicrosoft Affected 32-bit systems; x64-based systems Fixed in — No fix listed CNA
- Windows Server 2016 VendorMicrosoft Affected (Server Core installation) Fixed in — No fix listed CNA
- Windows Server 2008 R2 VendorMicrosoft Affected Itanium-Based Systems Service Pack 1; x64-based Systems Service Pack 1; x64-based Systems Service Pack 1 (Server Core installation) Fixed in — No fix listed CNA
- Windows 10 VendorMicrosoft Affected 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 Fixed in — No fix listed CNA
- Windows 10 Servers VendorMicrosoft Affected version 1709 (Server Core Installation); version 1803 (Server Core Installation) Fixed in — No fix listed CNA
CPE configurations NVD · 17
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10_1703:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:pro_n:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10_1703:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:pro_n:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
Show 7 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_server_2008:r2:*:*:*:*:*:itanium:* | r2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:r2:*:*:*:*:*:x64:* | r2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:*:* | r2 sp1 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* | r2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_server_2008:r2:*:*:*:*:*:itanium:* Versions r2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:r2:*:*:*:*:*:x64:* Versions r2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:*:* Versions r2 sp1 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* Versions r2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2025-03-03 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2018-8639
- 2026-10-03 Alias added: GHSA-93mm-g479-2cx4
More Microsoft Windows 10 1507 vulnerabilities
- TI-2017-06077 Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista… KEVCVSS 3.1CRITICAL 9.8
- TI-2025-24062 Windows SMB Client Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2025-24042 Internet Shortcut Files Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2024-32708 Windows Task Scheduler Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2024-29106 Windows MSHTML Platform Spoofing Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2024-19802 Windows MSHTML Platform Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2018-8639 · CVE Program
- CVE-2018-8639 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-93mm-g479-2cx4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences