EUVD-2026-73096
GHSA-7qqq-5jhq-w28c
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only UAF requiring low-privileged access and high-complexity heap manipulation; full C/I/A impact reflects SYSTEM-level privilege gain post-exploitation.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Use after free in Windows File History Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows File History Service across Windows 10, Windows 11, and Windows Server 2016/2019 allows a locally authenticated low-privileged attacker to gain SYSTEM-level access by exploiting a use-after-free memory corruption flaw (CWE-416) in the service process. The CVSS 7.0 score reflects real exploitation difficulty - attack complexity is high, indicating dependence on heap layout conditions or race-condition timing typical of UAF bugs. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a locally authenticated account with standard (low-privileged) user rights and interactive logon access to the target system - remote exploitation is not possible per the AV:L CVSS metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 score with AV:L/AC:H/PR:L correctly positions this as a meaningful but not trivially exploitable local privilege escalation. … 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 for the relevant Windows release via Windows Update, WSUS, or Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of Windows 10, Windows 11, and Server 2016/2019 systems with File History Service enabled, prioritizing systems where non-administrative users have interactive logon access. …
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Same weakness CWE-416 – Use After Free
View allSame technique Privilege Escalation
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External POC / Exploit Code
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