EUVD-2026-56350
GHSA-482f-f22h-3jvq
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only kernel race condition requiring an existing low-privilege account; AC:H reflects non-deterministic timing dependency; full system compromise warrants C/I/A:H with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in the Windows Bind Filter Driver exposes Windows 11 systems across three active release tracks to full SYSTEM-level compromise by locally authenticated low-privilege users exploiting a kernel race condition. Rated CVSS 7.0 with high attack complexity, the vulnerability reflects a timing-dependent flaw in shared kernel resource access rather than a simple code injection. No public exploit identified at time of analysis, and the vulnerability is absent from CISA KEV; Microsoft has released patches for all confirmed affected builds.
Technical ContextAI
The Windows Bind Filter Driver is a kernel-mode file system filter driver component in Windows. CWE-362 (Concurrent Execution Using Shared Resource with Improper Synchronization) identifies the root cause as a race condition - the driver fails to properly synchronize concurrent access to a shared resource, creating a time-of-check-to-time-of-use (TOCTOU) or similar timing window exploitable in kernel space. This kernel-level race is what drives the AC:H rating: winning the race reliably demands precise timing and likely repeated attempts. The flaw spans three Windows 11 release trains per EUVD CPE data: 24H2 (build series 10.0.26100.x), 25H2 (10.0.26200.x), and 26H1 (10.0.28000.x), indicating the vulnerable code path exists in a component shared across modern Windows 11 kernel builds. The 'Information Disclosure' tag in source metadata alongside the CWE-362 classification suggests the race window may also expose sensitive kernel memory prior to the privilege escalation, though the primary CVSS impact vector - C:H/I:H/A:H with S:U - confirms the dominant outcome is full local system compromise.
RemediationAI
Apply Microsoft's released patches to advance affected Windows 11 builds to or above the following fixed versions: 10.0.26100.9168 for Version 24H2, 10.0.26200.9168 for Version 25H2, and 10.0.28000.2704 for Version 26H1. Updates are available through Windows Update, Windows Server Update Services (WSUS), and the Microsoft Update Catalog; consult the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62705 for deployment guidance. Where immediate patching is not operationally feasible, restrict interactive logon and Remote Desktop access to the minimum set of trusted accounts, as exploitation unconditionally requires an active low-privilege local session - removing that session vector eliminates the attack surface. Enabling Windows Defender Credential Guard and monitoring for anomalous privilege escalation events (Windows Security Event ID 4672 - Special Logon, or equivalent EDR telemetry for unexpected SYSTEM token assignment) can provide detection signals but will not prevent exploitation. No driver-disable workaround is documented for the Bind Filter Driver without disrupting dependent file system filter functionality.
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Same weakness CWE-362 – Race Condition
View allSame technique Information Disclosure
View allShare
External POC / Exploit Code
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