CVE-2026-50694 - Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability is a use-after-free issue in SSTP that can lead to remote code execution on the server side. Microsoft rates it HIGH severity with a CVSS v3.1 base score of 8.1 and temporal score of 7.1. The attack vector is NETWORK, with HIGH attack complexity, NO privileges required, and NO user interaction. Microsoft reports no public disclosure, no known exploitation, and exploit code maturity is UNPROVEN. Because it affects a network-facing protocol and can be triggered by a specially crafted malicious SSTP packet, it is a meaningful enterprise risk for exposed SSTP servers.

Highlights:
- CVSS scores: Base 8.1 - Temporal 7.1
- Exploit status & code maturity: Publicly Disclosed: No; Exploited: No; Exploit Code Maturity: UNPROVEN.
- Impact: Remote Code Execution with HIGH confidentiality, integrity, and availability impacts.
- Exploitation likelihood: Exploitation Unlikely; NETWORK vector, NO privileges required, and NO user interaction, but HIGH attack complexity reduces practical exploitability.
- Severity for enterprise: High. Network-exposed SSTP servers are the primary concern because the vulnerability is remotely reachable and does not require authentication or user interaction.
- Patch status: available

Affected systems:
- Windows 10 1607
- Windows 10 1809
- Windows 10 21H2
- Windows 10 22H2
- Windows 11 24H2
- Windows 11 25H2
- Windows 11 26H1
- Windows 11 unspecified
- Windows Server 2012
- Windows Server 2012 R2
- Windows Server 2016
- Windows Server 2019
- Windows Server 2022
- Windows Server 2025