Windows CVE-2026-23673
HIGHCVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
Out-of-bounds read in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.
AnalysisAI
Windows ReFS contains an out-of-bounds read vulnerability affecting Server 2019, 2022, 2025, and Windows 11 26h1 that enables authenticated local users to escalate privileges with high impact to confidentiality, integrity, and availability. The vulnerability requires low attack complexity and no user interaction, making it exploitable by any authenticated user on the system. …
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RemediationAI
Within 24 hours: Inventory all systems running Windows ReFS and assess user access controls. Within 7 days: Implement strict access restrictions to ReFS volumes, disable ReFS where operationally feasible, and enhance monitoring for suspicious privilege escalation attempts. …
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