EUVD-2026-73366
GHSA-vf95-6wwg-wxmc
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local low-privilege attacker with no user interaction achieves full system compromise via UAF; vendor-supplied vector is well-grounded in the description.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Windows Server allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation via use-after-free (CWE-416) affects a broad swath of Microsoft Windows Server and Windows 10/11 releases, allowing an authenticated low-privilege attacker to gain SYSTEM-level access without user interaction. The CVSS vector (AV:L/AC:L/PR:L/UI:N) confirms exploitation requires only a standard local account and no special configuration, making this a practical post-exploitation stepping stone in any multi-user or RDP-exposed Windows environment. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local authenticated session on the target Windows system with at minimum a standard (low-privilege) user account - consistent with CVSS PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects a reliable local privilege escalation: low-privilege access is sufficient, complexity is low, and no user interaction is needed, yielding full confidentiality, integrity, and availability impact post-exploitation. … 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 Microsoft's cumulative update for the affected Windows build via Windows Update, WSUS, or Microsoft Update Catalog - patch availability is confirmed per vendor and EUVD-2026-73366. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows Server, Windows 10, and Windows 11 systems in your environment, prioritizing domain controllers, RDP gateways, and jump hosts; immediately begin patch testing in a non-production environment to validate compatibility with critical business applications. …
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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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