EUVD-2026-73663
GHSA-qx7p-9crp-h4hf
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Local exploit only (AV:L), high complexity to reliably trigger leak (AC:H), standard user account required (PR:L), no confidentiality or integrity impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Missing release of resource after effective lifetime in Windows Secure Socket Tunneling Protocol (SSTP) allows an authorized attacker to deny service locally.
AnalysisAI
Local denial of service in Windows Secure Socket Tunneling Protocol (SSTP) stems from a missing resource release after effective lifetime (CWE-772), allowing an authenticated local attacker to exhaust resources and cause service unavailability. The flaw spans a broad range of Windows and Windows Server releases from Server 2012 through Windows 11 26H1 and Server 2025, confirmed by Microsoft's security response center. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) local interactive or remote-shell access to the target Windows system as a low-privileged authenticated user (PR:L); (2) the Windows SSTP service (SstpSvc) must be running and reachable on the target system - SSTP is not enabled by default on workstations but is a standard component of Windows Server VPN/RAS configurations; (3) high attack complexity (AC:H) - likely a race condition or specific sequence of operations to reliably trigger the resource leak rather than a trivial single-request trigger. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.7 (Medium) score accurately reflects the constrained real-world risk profile. … 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 | Vendor-released patch: apply the respective cumulative update for each affected Windows or Windows Server build listed above via Windows Update or WSUS; the exact target build numbers are listed in the affected versions data (e.g., Windows Server 2025 should reach 10.0.26100.33438 or later). … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same technique Denial Of Service
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External POC / Exploit Code
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