EUVD-2026-56339
GHSA-vq27-qm6j-96h2
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack vector confirmed by description; PR:L matches 'authorized attacker'; kernel UAF yields full C/I/A impact with low complexity and no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation via use-after-free in the Windows Bind Filter Driver affects Windows 11 (versions 23H2 through 26H1) and Windows Server 2025, allowing a locally authenticated attacker to gain SYSTEM-level privileges. The memory corruption flaw (CWE-416) is triggered through the kernel-mode filter driver component, yielding full confidentiality, integrity, and availability impact per CVSS. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an existing authenticated local session on the target system - the CVSS PR:L metric confirms a low-privileged Windows user account is sufficient, with no administrative rights needed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) scores 7.8 and accurately reflects a low-complexity local privilege escalation requiring only standard user credentials - consistent with the description of an 'authorized attacker.' SSVC rates technical impact as 'total,' aligning with the C:H/I:H/A:H triad. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary remediation is applying the vendor-released patch via Windows Update or WSUS, targeting the specific fixed builds per edition: Windows 11 23H2 must reach 10.0.22631.7517 or later; Windows 11 24H2 and 25H2 must reach 10.0.26100.9168 or later; Windows 11 26H1 must reach 10.0.28000.2704 or later; Windows Server 2025 (full) must reach 10.0.26100.33296 or later; and Windows Server 2025 Server Core must reach 10.0.26100.9168 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running Windows 11 (versions 23H2 through 26H1) and Windows Server 2025, prioritizing servers hosting critical workloads or supporting multi-user access. …
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
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