EUVD-2026-73645
GHSA-5hhc-2xgq-33gp
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only access, low-privileged account required, high complexity for UAF heap manipulation; full C/I/A impact after successful privilege escalation to SYSTEM.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
4DescriptionNVD
Use after free in Windows AF_UNIX Socket Provider allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in the Windows AF_UNIX Socket Provider allows a local low-privileged attacker to gain full system-level control via a use-after-free memory corruption flaw. The vulnerability spans virtually all supported and some legacy Windows releases - from Windows Server 2012 through Windows 11 26H1 and Windows Server 2025 - making it extremely broad in scope. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local authenticated session on the affected Windows host with at least a standard (low-privileged) user account - CVSS PR:L confirms this. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H accurately characterises this as a local privilege-escalation flaw requiring a low-privileged account and high attack complexity - the latter almost certainly reflecting a race-condition or heap-grooming requirement typical of UAF exploits. … 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 applicable Windows version as documented in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70565. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all Windows systems running affected versions (Windows Server 2012-2025 and Windows 11 clients), with special attention to shared systems and multi-tenant infrastructure. …
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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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