EUVD-2026-73119
GHSA-grc7-3gc3-42h2
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local low-privilege UAF requiring race condition (AC:H) to achieve full privilege escalation; unchanged scope as exploitation is contained to the local system.
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 via use-after-free in the Windows File History Service allows a local authenticated attacker to gain full system-level access. The vulnerability affects a wide range of Windows 10, Windows 11, and Windows Server 2016/2019 builds, patched by Microsoft in the corresponding Patch Tuesday update cycle. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have an authenticated local session on the target system - any standard domain or local user account satisfies the PR:L prerequisite. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is moderate-to-high in environments where untrusted local users exist - for example, shared workstations, terminal servers, or VDI fleets. … 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 vendor-released patches via Windows Update or WSUS, targeting the specific fixed build numbers per OS version: Windows 10 1607/Server 2016 → 10.0.14393.9512; Windows 10 1809/Server 2019 → 10.0.17763.9245; Windows 10 21H2 → 10.0.19044.7725; Windows 10 22H2 → 10.0.19045.7725; Windows 11 23H2 → 10.0.22631.7582; Windows 11 24H2 → 10.0.26100.9445; Windows 11 25H2 → 10.0.26200.9445; Windows 11 26H1 → 10.0.28000.2954. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, Windows 11, and Windows Server 2016/2019 systems across your environment to assess exposure scope and prioritize systems by business criticality. …
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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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