EUVD-2026-56613
GHSA-p72q-6pvr-2q6j
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Race condition root cause (CWE-362) raises complexity to AC:H; all other metrics align with local low-privilege exploitation with full system impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Windows Work Folder Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in the Windows Work Folder Service allows an authenticated local attacker to gain SYSTEM-level privileges via a use-after-free memory corruption flaw rooted in a race condition (CWE-362). The vulnerability affects a wide range of Windows client and server releases from Windows Server 2012 R2 through Windows 11 26H1 and Windows Server 2025. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authorized (authenticated) local user account on the target system - the CVSS vector PR:L confirms low-privilege local authentication is sufficient, with no additional administrative rights needed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects full confidentiality, integrity, and availability impact achievable by a low-privileged local user. … 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 to apply Microsoft's released security update via Windows Update or WSUS, upgrading affected systems to the patched builds listed per OS version: Windows Server 2025 to 10.0.26100.33296, Windows Server 2022 to 10.0.20348.5499, Windows Server 2019 to 10.0.17763.9115, Windows Server 2016 to 10.0.14393.9418, Windows Server 2012 R2 to 6.3.9600.23337, Windows 11 26H1 to 10.0.28000.2704, Windows 11 25H2 to 10.0.26200.9168, Windows 11 24H2 to 10.0.26100.9168, Windows 11 23H2 to 10.0.22631.7517, Windows 10 21H2/22H2 to 10.0.19044.7663/10.0.19045.7663, and Windows 10 1607/1809 to their respective 9418/9115 patch levels. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows systems running Server 2012 R2 through 2025 and Windows 11 26H1 or earlier, and identify systems with multi-user access. …
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Same weakness CWE-362 – Race Condition
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External POC / Exploit Code
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