Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
Are the updates for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems currently available?
Yes. As of April 9, 2025, the security update (5055547) for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems are available. Customers running Windows 10 should ensure the update is installed to be protected from this vulnerability.
According to the CVSS metric, the attack vector is local (AV:L) while user interaction is required (UI:R). What does that mean for this vulnerability?
An attacker can trick a local user on a vulnerable system into mounting a specially crafted VHD that would then trigger the vulnerability.
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
Security updates
10.0.17763.7136 — https://support.microsoft.com/help/5055519
10.0.10240.20978 — https://support.microsoft.com/help/5055547
10.0.14393.7969 — https://support.microsoft.com/help/5055521
6.0.6003.23220 — https://support.microsoft.com/help/5055609
6.0.6003.23220 — https://support.microsoft.com/help/5055596
6.1.7601.27670 — https://support.microsoft.com/help/5055561
6.1.7601.27670 — https://support.microsoft.com/help/5055570
6.2.9200.25423 — https://support.microsoft.com/help/5055581
6.3.9600.22523 — https://support.microsoft.com/help/5055557
Vulnerabilities 1
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High 7.8
NTFS Elevation of Privilege Vulnerability
Out-of-bounds read in Windows NTFS allows an unauthorized attacker to elevate privileges locally.
Revision history
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#2
The security updates for Windows 10 for 32-bit Systems and Windows 10 for x64-based Systems are now available. See the Security Updates table for more information.
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#1
Information published.
References
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CVE-2025-27733 NTFS Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27733
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss