EUVD-2026-73703
GHSA-r2g5-x898-45hg
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access required (AV:L), race condition implies high complexity (AC:H), low-privilege authenticated user needed (PR:L), full system compromise on success (C:H/I:H/A:H).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Windows Work Folder Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Use-after-free in the Windows Work Folder Service enables a locally authenticated, low-privileged attacker to escalate privileges to SYSTEM on a broad range of Windows client and server releases. The flaw (CWE-416) requires high attack complexity - consistent with a race condition - and local access, but grants full confidentiality, integrity, and availability impact upon successful exploitation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated low-privilege local user session on an affected Windows host - remote unauthenticated exploitation is not possible per the AV:L/PR:L CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 score is grounded in the AV:L/AC:H vector, which meaningfully suppresses real-world exploitability: an attacker must already have interactive or remote shell access as a low-privilege user, then win a timing race or construct a precise heap layout - a non-trivial hurdle. … 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 | Apply the Microsoft security update addressing CVE-2026-69560, available through Windows Update, WSUS, and the Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify and inventory all Windows client and server systems running Work Folder Service across your organization, prioritizing production servers and systems processing sensitive data. …
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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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