Read the docs
TI-2025-20318 Aliases CVE-2025-27483GHSA-h8h5-8pv5-88g9

NTFS Elevation of Privilege Vulnerability

Priority LOW 37CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
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

Out-of-bounds read in Windows NTFS allows an unauthorized attacker to elevate privileges locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00774 55th percentileScored 2026-11-07
Fix Fixed Microsoft: 4 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
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 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
  • 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 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

CPE configurations NVD · 9

CPEVersionsRoleVendor
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_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_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_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

Remediation

Microsoft 4 updates

  • 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
  • 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
Show 1 more Microsoft updates
  • 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

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-27483
  2. 2026-10-03 Alias added: GHSA-h8h5-8pv5-88g9

References

Patch 1

  • 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
See all 1229 →

Sources

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