Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What architecture(s) are impacted by this vulnerability?
This vulnerability impacts ARM64 only.
How could an attacker exploit this vulnerability and what privileges could an attacker gain?
An authenticated attacker could escalate privileges to Secure Kernel by overwriting the page table data meant for the kernel.
Security updates
10.0.19044.5371 — https://support.microsoft.com/help/5049981
10.0.22621.4751 — https://support.microsoft.com/help/5050021
10.0.26100.2894 — https://support.microsoft.com/help/5050009
Vulnerabilities 1
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High 7.8
Windows Secure Kernel Mode Elevation of Privilege Vulnerability
Windows Secure Kernel Mode Elevation of Privilege Vulnerability
Revision history
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#2
In the Security Updates table, added Download and Article links for Windows Server 2025 (Server Core installation). Microsoft recommends that customers install the update to be fully protected from the vulnerability. Customers whose systems are configured to receive automatic updates do not need to take any further action.
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#1
Information published.
References
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CVE-2025-21325 Windows Secure Kernel Mode Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21325
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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