Vulnerability Intelligence Report
Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability
CVE-2026-73009
Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to execute code over a network.
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:0.97%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-416 ↗CWE-416: Use After Free
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 < 10.0.14393.9512 (affected) |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 < 10.0.17763.9245 (affected) |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 < 10.0.19044.7725 (affected) |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 < 10.0.19045.7725 (affected) |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0 < 10.0.22631.7582 (affected) |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 < 10.0.22631.7582 (affected) |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 < 10.0.26100.9445 (affected) |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 < 10.0.26200.9445 (affected) |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 < 10.0.28000.2954 (affected) |
| Microsoft | Windows Server 2012 | 6.2.9200.0 < 6.2.9200.26349 (affected) |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 < 6.2.9200.26349 (affected) |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 < 6.3.9600.23398 (affected) |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 < 6.3.9600.23398 (affected) |
| Microsoft | Windows Server 2016 | 10.0.14393.0 < 10.0.14393.9512 (affected) |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 < 10.0.14393.9512 (affected) |
| Microsoft | Windows Server 2019 | 10.0.17763.0 < 10.0.17763.9245 (affected) |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 < 10.0.17763.9245 (affected) |
| Microsoft | Windows Server 2022 | 10.0.20348.0 < 10.0.20348.5622 (affected) |
| Microsoft | Windows Server 2025 | 10.0.26100.0 < 10.0.26100.33438 (affected) |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 < 10.0.26100.33438 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.974%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2026-08-10T18:43:43 |
| Published | 2026-09-08T17:18:05 |
| Patch Date | 2026-09-08 |
| Last Updated | 2026-10-08T18:19:14 |
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