CVE-2025-59244: NTLM Hash Disclosure Spoofing Vulnerability

Severity: medium (CVSS 6.5 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: 2025-10-14 · updated 2026-06-17
Weakness: CWE-73

Description

External control of file name or path in Windows Core Shell allows an unauthorized attacker to perform spoofing over a network.

Affected products

Microsoft Windows 10 Version 1507: before 10.0.10240.21161 — fixed in 10.0.10240.21161
Microsoft Windows 10 1607: before 10.0.14393.8519 — fixed in 10.0.14393.8519
Microsoft Windows 10: before 10.0.17763.7919 — fixed in 10.0.17763.7919
Microsoft Windows 10: before 10.0.19044.6456 — fixed in 10.0.19044.6456
Microsoft Windows 10: before 10.0.19045.6456 — fixed in 10.0.19045.6456
Microsoft Windows 11: before 10.0.22621.6060 — fixed in 10.0.22621.6060
Microsoft Windows 11: through 10.0.22631.6060
Microsoft Windows 11: before 10.0.26100.6899 — fixed in 10.0.26100.6899
Microsoft Windows 11 25H2: before 10.0.26200.6899 — fixed in 10.0.26200.6899
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: through 10.0.14393.8519
Microsoft Windows Server 2019: before 10.0.17763.7919 — fixed in 10.0.17763.7919
Microsoft Windows Server 2022: before 10.0.20348.4294 — fixed in 10.0.20348.4294
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1913 — fixed in 10.0.25398.1913
Microsoft Windows Server 2025: through 10.0.26100.6899
Microsoft Windows 10 Version 1507: from 10.0.10240.0 before 10.0.10240.21161 — fixed in 10.0.10240.21161
Microsoft Windows 10 1607: from 10.0.14393.0 before 10.0.14393.8519 — fixed in 10.0.14393.8519
Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.7919 — fixed in 10.0.17763.7919
Microsoft Windows 10: from 10.0.19044.0 before 10.0.19044.6456 — fixed in 10.0.19044.6456
Microsoft Windows 10: from 10.0.19045.0 before 10.0.19045.6456 — fixed in 10.0.19045.6456
Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.6060 — fixed in 10.0.22621.6060
Microsoft Windows 11 version 22H3: from 10.0.22631.0 before 10.0.22631.6060 — fixed in 10.0.22631.6060
Microsoft Windows 11: from 10.0.22631.0 before 10.0.22631.6060 — fixed in 10.0.22631.6060
Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.6899 — fixed in 10.0.26100.6899
Microsoft Windows 11 25H2: from 10.0.26200.0 before 10.0.26200.6899 — fixed in 10.0.26200.6899
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.22824 — fixed in 6.3.9600.22824
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.8519 — fixed in 10.0.14393.8519
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.7919 — fixed in 10.0.17763.7919
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.4294 — fixed in 10.0.20348.4294
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1913 — fixed in 10.0.25398.1913

How to fix

Upgrade to a fixed version: Microsoft Windows 10 Version 1507 10.0.10240.21161; Microsoft Windows 10 1607 10.0.14393.8519; Microsoft Windows 10 10.0.17763.7919; Microsoft Windows 10 10.0.19044.6456; Microsoft Windows 10 10.0.19045.6456; Microsoft Windows 11 10.0.22621.6060; Microsoft Windows 11 10.0.26100.6899; Microsoft Windows 11 25H2 10.0.26200.6899; Microsoft Windows Server 2019 10.0.17763.7919; Microsoft Windows Server 2022 10.0.20348.4294; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1913; Microsoft Windows 10 Version 1507 10.0.10240.21161. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59244

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