EUVD-2026-73107
GHSA-pf4h-cvvr-c56r
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local UAF requiring race-condition win (AC:H), low-privileged authenticated attacker (PR:L), with full system compromise on success.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an authorized attacker to execute code locally.
AnalysisAI
Local code execution is achievable in Windows Secure Socket Tunneling Protocol (SSTP) across a broad range of Windows 10, Windows 11, and Windows Server releases via a use-after-free memory corruption flaw (CWE-416). An authorized attacker with low-privileged local access and the ability to satisfy high-complexity exploitation conditions can achieve full C/I/A compromise of the local system. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have an existing authenticated session on the target Windows system - a low-privileged local or remote-interactive (e.g., RDP) account satisfies PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 score with vector AV:L/AC:H/PR:L reflects a bounded but meaningful local privilege-escalation scenario: the attacker must already be logged on with a standard account and must win a race or satisfy memory-state preconditions. … 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 installed Windows version as listed in EUVD-2026-73107; the exact patched build numbers are: Windows Server 2016/Windows 10 1607 - 10.0.14393.9512; Windows Server 2019/Windows 10 1809 - 10.0.17763.9245; Windows Server 2022 - 10.0.20348.5622; Windows Server 2025/Windows 11 24H2 - 10.0.26100.33438 (Server 2025) or 10.0.26100.9445 (Win 11 24H2); Windows 11 25H2 - 10.0.26200.9445; Windows 11 26H1 - 10.0.28000.2954; Windows 11 23H2 - 10.0.22631.7582; Windows 10 21H2/22H2 - 10.0.19044.7725/10.0.19045.7725; Server 2012 R2 - 6.3.9600.23397; Server 2012 - 6.2.9200.26349. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, deploy Microsoft-released patches to all Windows 10, Windows 11, and Windows Server systems, prioritizing administrative workstations and server infrastructure. …
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Same weakness CWE-416 – Use After Free
View allSame technique Denial Of Service
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External POC / Exploit Code
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