CVE-2025-27483: NTFS Elevation of Privilege Vulnerability

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-04-08 · updated 2026-08-10
Weakness: CWE-125

Description

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

Affected products

Microsoft Windows 10 Version 1507: before 10.0.10240.20978 — fixed in 10.0.10240.20978
Microsoft Windows 10 1607: before 10.0.14393.7969 — fixed in 10.0.14393.7969
Microsoft Windows 10: before 10.0.17763.7136 — fixed in 10.0.17763.7136
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: before 10.0.14393.7969 — fixed in 10.0.14393.7969
Microsoft Windows Server 2019: before 10.0.17763.7136 — fixed in 10.0.17763.7136
Microsoft Windows 10 Version 1507: from 10.0.10240.0 before 10.0.10240.20978 — fixed in 10.0.10240.20978
Microsoft Windows 10 1607: from 10.0.14393.0 before 10.0.14393.7969 — fixed in 10.0.14393.7969
Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.7136 — fixed in 10.0.17763.7136
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.22523 — fixed in 6.3.9600.22523
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.7969 — fixed in 10.0.14393.7969
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.7136 — fixed in 10.0.17763.7136

How to fix

Upgrade to a fixed version: Microsoft Windows 10 Version 1507 10.0.10240.20978; Microsoft Windows 10 1607 10.0.14393.7969; Microsoft Windows 10 10.0.17763.7136; Microsoft Windows Server 2016 10.0.14393.7969; Microsoft Windows Server 2019 10.0.17763.7136; Microsoft Windows 10 Version 1507 10.0.10240.20978; Microsoft Windows 10 1607 10.0.14393.7969; Microsoft Windows 10 10.0.17763.7136; Microsoft Windows Server 2012 R2 6.3.9600.22523; Microsoft Windows Server 2016 10.0.14393.7969; Microsoft Windows Server 2019 10.0.17763.7136. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27483

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