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TI-2025-19621 Aliases CVE-2025-26687GHSA-p9qw-h5h2-6vw8

Win32k Elevation of Privilege Vulnerability

Priority LOW 37CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

Use after free in Windows Win32K - GRFX allows an unauthorized attacker to elevate privileges over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01164 67th percentileScored 2026-11-07
Fix Fixed Microsoft: 14 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Office for Android16.0.1 to before 16.0.18730.2000016.0.18730.20000Patch availableCNA
MicrosoftMicrosoft Office for Universal16.0.1 to before 16.0.14326.2233116.0.14326.22331Patch availableCNA
MicrosoftWindows 10 Version 150710.0.10240.0 to before 10.0.10240.2097810.0.10240.20978Patch availableCNA
MicrosoftWindows 10 Version 160710.0.14393.0 to before 10.0.14393.796910.0.14393.7969Patch availableCNA
MicrosoftWindows 10 Version 180910.0.17763.0 to before 10.0.17763.713610.0.17763.7136Patch availableCNA
MicrosoftWindows 10 Version 21H210.0.19044.0 to before 10.0.19044.573710.0.19044.5737Patch availableCNA
MicrosoftWindows 10 Version 22H210.0.19045.0 to before 10.0.19045.573710.0.19045.5737Patch availableCNA
MicrosoftWindows 11 version 22H210.0.22621.0 to before 10.0.22621.518910.0.22621.5189Patch availableCNA
MicrosoftWindows 11 version 22H310.0.22631.0 to before 10.0.22631.518910.0.22631.5189Patch availableCNA
MicrosoftWindows 11 Version 23H210.0.22631.0 to before 10.0.22631.518910.0.22631.5189Patch availableCNA
MicrosoftWindows 11 Version 24H210.0.26100.0 to before 10.0.26100.377510.0.26100.3775Patch availableCNA
MicrosoftWindows Server 2008 R2 Service Pack 16.1.7601.0 to before 6.1.7601.276706.1.7601.27670Patch availableCNA
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)6.1.7601.0 to before 6.1.7601.276706.1.7601.27670Patch availableCNA
MicrosoftWindows Server 2008 Service Pack 26.0.6003.0 to before 6.0.6003.232206.0.6003.23220Patch availableCNA
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)6.0.6003.0 to before 6.0.6003.232206.0.6003.23220Patch availableCNA
MicrosoftWindows Server 20126.2.9200.0 to before 6.2.9200.254236.2.9200.25423Patch availableCNA
MicrosoftWindows Server 2012 (Server Core installation)6.2.9200.0 to before 6.2.9200.254236.2.9200.25423Patch availableCNA
MicrosoftWindows Server 2012 R26.3.9600.0 to before 6.3.9600.225236.3.9600.22523Patch availableCNA
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.0 to before 6.3.9600.225236.3.9600.22523Patch availableCNA
MicrosoftWindows Server 201610.0.14393.0 to before 10.0.14393.796910.0.14393.7969Patch availableCNA
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 to before 10.0.14393.796910.0.14393.7969Patch availableCNA
MicrosoftWindows Server 201910.0.17763.0 to before 10.0.17763.713610.0.17763.7136Patch availableCNA
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 to before 10.0.17763.713610.0.17763.7136Patch availableCNA
MicrosoftWindows Server 202210.0.20348.0 to before 10.0.20348.345310.0.20348.3453Patch availableCNA
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)10.0.25398.0 to before 10.0.25398.155110.0.25398.1551Patch availableCNA
MicrosoftWindows Server 202510.0.26100.0 to before 10.0.26100.377510.0.26100.3775Patch availableCNA
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 to before 10.0.26100.377510.0.26100.3775Patch availableCNA
  • Microsoft Office for Android VendorMicrosoft Affected 16.0.1 to before 16.0.18730.20000 Fixed in 16.0.18730.20000 Patch available CNA
  • Microsoft Office for Universal VendorMicrosoft Affected 16.0.1 to before 16.0.14326.22331 Fixed in 16.0.14326.22331 Patch available CNA
  • Windows 10 Version 1507 VendorMicrosoft Affected 10.0.10240.0 to before 10.0.10240.20978 Fixed in 10.0.10240.20978 Patch available CNA
  • Windows 10 Version 1607 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.7969 Fixed in 10.0.14393.7969 Patch available CNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.7136 Fixed in 10.0.17763.7136 Patch available CNA
  • Windows 10 Version 21H2 VendorMicrosoft Affected 10.0.19044.0 to before 10.0.19044.5737 Fixed in 10.0.19044.5737 Patch available CNA
  • Windows 10 Version 22H2 VendorMicrosoft Affected 10.0.19045.0 to before 10.0.19045.5737 Fixed in 10.0.19045.5737 Patch available CNA
  • Windows 11 version 22H2 VendorMicrosoft Affected 10.0.22621.0 to before 10.0.22621.5189 Fixed in 10.0.22621.5189 Patch available CNA
  • Windows 11 version 22H3 VendorMicrosoft Affected 10.0.22631.0 to before 10.0.22631.5189 Fixed in 10.0.22631.5189 Patch available CNA
  • Windows 11 Version 23H2 VendorMicrosoft Affected 10.0.22631.0 to before 10.0.22631.5189 Fixed in 10.0.22631.5189 Patch available CNA
  • Windows 11 Version 24H2 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.3775 Fixed in 10.0.26100.3775 Patch available CNA
  • Windows Server 2008 R2 Service Pack 1 VendorMicrosoft Affected 6.1.7601.0 to before 6.1.7601.27670 Fixed in 6.1.7601.27670 Patch available CNA
  • Windows Server 2008 R2 Service Pack 1 (Server Core installation) VendorMicrosoft Affected 6.1.7601.0 to before 6.1.7601.27670 Fixed in 6.1.7601.27670 Patch available CNA
  • Windows Server 2008 Service Pack 2 VendorMicrosoft Affected 6.0.6003.0 to before 6.0.6003.23220 Fixed in 6.0.6003.23220 Patch available CNA
  • Windows Server 2008 Service Pack 2 (Server Core installation) VendorMicrosoft Affected 6.0.6003.0 to before 6.0.6003.23220 Fixed in 6.0.6003.23220 Patch available CNA
  • Windows Server 2012 VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.25423 Fixed in 6.2.9200.25423 Patch available CNA
  • Windows Server 2012 (Server Core installation) VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.25423 Fixed in 6.2.9200.25423 Patch available CNA
  • Windows Server 2012 R2 VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.22523 Fixed in 6.3.9600.22523 Patch available CNA
  • Windows Server 2012 R2 (Server Core installation) VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.22523 Fixed in 6.3.9600.22523 Patch available CNA
  • Windows Server 2016 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.7969 Fixed in 10.0.14393.7969 Patch available CNA
  • Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.7969 Fixed in 10.0.14393.7969 Patch available CNA
  • Windows Server 2019 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.7136 Fixed in 10.0.17763.7136 Patch available CNA
  • Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.7136 Fixed in 10.0.17763.7136 Patch available CNA
  • Windows Server 2022 VendorMicrosoft Affected 10.0.20348.0 to before 10.0.20348.3453 Fixed in 10.0.20348.3453 Patch available CNA
  • Windows Server 2022, 23H2 Edition (Server Core installation) VendorMicrosoft Affected 10.0.25398.0 to before 10.0.25398.1551 Fixed in 10.0.25398.1551 Patch available CNA
  • Windows Server 2025 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.3775 Fixed in 10.0.26100.3775 Patch available CNA
  • Windows Server 2025 (Server Core installation) VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.3775 Fixed in 10.0.26100.3775 Patch available CNA

CPE configurations NVD · 23

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:365_copilot:*:*:*:*:*:android:*:*before 16.0.18730.20000VulnerableMicrosoft
cpe:2.3:a:microsoft:office:*:*:*:*:*:universal:*:*before 16.0.14326.22331VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:*before 10.0.10240.20978VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*before 10.0.10240.20978VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*before 10.0.14393.7969VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*before 10.0.14393.7969VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*before 10.0.17763.7136VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*before 10.0.17763.7136VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*before 10.0.19044.5737VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*before 10.0.19045.5737VulnerableMicrosoft
  • cpe:2.3:a:microsoft:365_copilot:*:*:*:*:*:android:*:* Versions before 16.0.18730.20000 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:office:*:*:*:*:*:universal:*:* Versions before 16.0.14326.22331 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:* Versions before 10.0.10240.20978 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:* Versions before 10.0.10240.20978 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* Versions before 10.0.14393.7969 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* Versions before 10.0.14393.7969 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* Versions before 10.0.17763.7136 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* Versions before 10.0.17763.7136 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:* Versions before 10.0.19044.5737 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:* Versions before 10.0.19045.5737 Vulnerable ·Microsoft
Show 13 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*before 10.0.22621.5189VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*before 10.0.22631.5189VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*before 10.0.26100.3775VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*r2 sp1VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*r2VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*before 10.0.14393.7969VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*before 10.0.17763.7136VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*before 10.0.20348.3453VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*before 10.0.25398.1551VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*before 10.0.26100.3775VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:* Versions before 10.0.22621.5189 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:* Versions before 10.0.22631.5189 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:* Versions before 10.0.26100.3775 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* 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 before 10.0.14393.7969 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* Versions before 10.0.17763.7136 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* Versions before 10.0.20348.3453 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* Versions before 10.0.25398.1551 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* Versions before 10.0.26100.3775 Vulnerable ·Microsoft

Remediation

Microsoft 14 updates

  • KB5055609
    Monthly Rollup
    • Windows Server 2008 for 32-bit Systems Service Pack 2 6.0.6003.23220
    • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 6.0.6003.23220
    • Windows Server 2008 for x64-based Systems Service Pack 2 6.0.6003.23220
    • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 6.0.6003.23220
  • KB5055596
    Security Only
    • Windows Server 2008 for 32-bit Systems Service Pack 2 6.0.6003.23220
    • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 6.0.6003.23220
    • Windows Server 2008 for x64-based Systems Service Pack 2 6.0.6003.23220
    • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 6.0.6003.23220
  • KB5055581
    Monthly Rollup
    • Windows Server 2012 6.2.9200.25423
    • Windows Server 2012 (Server Core installation) 6.2.9200.25423
Show 11 more Microsoft updates
  • KB5055570
    Security Only
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 6.1.7601.27670
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 6.1.7601.27670
  • KB5055561
    Monthly Rollup
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 6.1.7601.27670
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 6.1.7601.27670
  • KB5055557
    Monthly Rollup
    • Windows Server 2012 R2 6.3.9600.22523
    • Windows Server 2012 R2 (Server Core installation) 6.3.9600.22523
  • KB5055547
    Security Update
    • Windows 10 for 32-bit Systems 10.0.10240.20978
    • Windows 10 for x64-based Systems 10.0.10240.20978
  • KB5055528
    Security Update
    • Windows 11 Version 22H2 for ARM64-based Systems 10.0.22621.5189
    • Windows 11 Version 22H2 for x64-based Systems 10.0.22621.5189
    • Windows 11 Version 23H2 for ARM64-based Systems 10.0.22631.5189
    • Windows 11 Version 23H2 for x64-based Systems 10.0.22631.5189
  • KB5055527
    Security Update
    • Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1551
  • KB5055526
    Security Update
    • Azure Stack HCI OS 22H2 10.0.20348.3328
    • Windows Server 2022 10.0.20348.3453
    • Windows Server 2022 (Server Core installation) 10.0.20348.3453
  • KB5055523
    Security Update
    • Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.3775
    • Windows 11 Version 24H2 for x64-based Systems 10.0.26100.3775
    • Windows Server 2025 10.0.26100.3775
    • Windows Server 2025 (Server Core installation) 10.0.26100.3775
  • KB5055521
    Security Update
    • Windows 10 Version 1607 for 32-bit Systems 10.0.14393.7969
    • Windows 10 Version 1607 for x64-based Systems 10.0.14393.7969
    • Windows Server 2016 10.0.14393.7969
    • Windows Server 2016 (Server Core installation) 10.0.14393.7969
  • KB5055519
    Security Update
    • Windows 10 Version 1809 for 32-bit Systems 10.0.17763.7136
    • Windows 10 Version 1809 for x64-based Systems 10.0.17763.7136
    • Windows Server 2019 10.0.17763.7136
    • Windows Server 2019 (Server Core installation) 10.0.17763.7136
  • KB5055518
    Security Update
    • Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.5737
    • Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.5737
    • Windows 10 Version 21H2 for x64-based Systems 10.0.19044.5737
    • Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.5737
    • Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.5737
    • Windows 10 Version 22H2 for x64-based Systems 10.0.19045.5737
    • Windows 11 version 21H2 for ARM64-based Systems 10.0.19044.5737
    • Windows 11 version 21H2 for x64-based Systems 10.0.19044.5737

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Microsoft Office for AndroidFixed 16.0.18730.20000 · Security Update
Microsoft Office for UniversalFixed 16.0.14326.22331 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-26687
  2. 2026-10-03 Alias added: GHSA-p9qw-h5h2-6vw8

References

Patch 1

  • TI-2025-37796 GDI+ Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2025-23775 M365 Copilot Information Disclosure Vulnerability CVSS 3.1CRITICAL 9.3
  • TI-2025-33667 GDI+ Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2021-19684 Microsoft Office app Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.6
  • TI-2026-37251 Microsoft M365 Copilot Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.9
  • TI-2026-39054 M365 Copilot Information Disclosure Vulnerability CVSS 3.1CRITICAL 9.8
See all 54 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences