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CVE-2025-54115: Windows Hyper-V Elevation of Privilege Vulnerability

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-09 · updated 2026-06-17
• Weakness: CWE-362

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Hyper-V allows an authorized attacker to elevate privileges locally.

Affected products

• Microsoft Windows 10: before 10.0.17763.7792 — fixed in 10.0.17763.7792
• Microsoft Windows 10: before 10.0.19044.6332 — fixed in 10.0.19044.6332
• Microsoft Windows 10: before 10.0.19045.6332 — fixed in 10.0.19045.6332
• Microsoft Windows 11: before 10.0.22621.5909 — fixed in 10.0.22621.5909
• Microsoft Windows 11: before 10.0.22631.5909 — fixed in 10.0.22631.5909
• Microsoft Windows 11: before 10.0.26100.6508 — fixed in 10.0.26100.6508
• Microsoft Windows Server 2019: before 10.0.17763.7792 — fixed in 10.0.17763.7792
• Microsoft Windows Server 2022: before 10.0.20348.4106 — fixed in 10.0.20348.4106
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1849 — fixed in 10.0.25398.1849
• Microsoft Windows Server 2025: before 10.0.26100.6508 — fixed in 10.0.26100.6508
• Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.7792 — fixed in 10.0.17763.7792
• Microsoft Windows 10: from 10.0.19044.0 before 10.0.19044.6332 — fixed in 10.0.19044.6332
• Microsoft Windows 10: from 10.0.19045.0 before 10.0.19045.6332 — fixed in 10.0.19045.6332
• Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.5909 — fixed in 10.0.22621.5909
• Microsoft Windows 11 version 22H3: from 10.0.22631.0 before 10.0.22631.5909 — fixed in 10.0.22631.5909
• Microsoft Windows 11: from 10.0.22631.0 before 10.0.22631.5909 — fixed in 10.0.22631.5909
• Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.6584 — fixed in 10.0.26100.6584
• Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.7792 — fixed in 10.0.17763.7792
• Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.4171 — fixed in 10.0.20348.4171
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1849 — fixed in 10.0.25398.1849
• Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.6584 — fixed in 10.0.26100.6584

How to fix

Upgrade to a fixed version: Microsoft Windows 10 10.0.17763.7792; Microsoft Windows 10 10.0.19044.6332; Microsoft Windows 10 10.0.19045.6332; Microsoft Windows 11 10.0.22621.5909; Microsoft Windows 11 10.0.22631.5909; Microsoft Windows 11 10.0.26100.6508; Microsoft Windows Server 2019 10.0.17763.7792; Microsoft Windows Server 2022 10.0.20348.4106; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1849; Microsoft Windows Server 2025 10.0.26100.6508; Microsoft Windows 10 10.0.17763.7792; Microsoft Windows 10 10.0.19044.6332. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54115
• https://www.vicarius.io/vsociety/posts/cve-2025-54115-detection-script-privilege-elevation-vulnerability-in-windows-hyper-v
• https://www.vicarius.io/vsociety/posts/cve-2025-54115-mitigation-script-privilege-elevation-vulnerability-in-windows-hyper-v

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