Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
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
10.0.28000.1719 — https://support.microsoft.com/help/5079466
10.0.20348.4893 — https://support.microsoft.com/help/5078766
10.0.20348.4830 — https://support.microsoft.com/help/5078737
10.0.17763.8511 — https://support.microsoft.com/help/5078752
10.0.19044.7058 — https://support.microsoft.com/help/5078885
10.0.26100.32522 — https://support.microsoft.com/help/5078740
10.0.26100.32463 — https://support.microsoft.com/help/5078736
10.0.22631.6783 — https://support.microsoft.com/help/5078883
10.0.26200.8037 — https://support.microsoft.com/help/5079473
10.0.26200.7979 — https://support.microsoft.com/help/5079420
10.0.25398.2207 — https://support.microsoft.com/help/5078734
10.0.14393.8957 — https://support.microsoft.com/help/5078938
6.2.9200.25973 — https://support.microsoft.com/help/5078775
6.3.9600.23074 — https://support.microsoft.com/help/5078774
Vulnerabilities 1
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High 7.8
Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability
Out-of-bounds read in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.
Revision history
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#1
Information published.
References
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CVE-2026-23673 Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23673
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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