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CVE-2026-50694 Microsoft CVE debrief

CVE-2026-50694 is a high-severity vulnerability in Windows Secure Socket Tunneling Protocol (SSTP) that allows unauthorized attackers to execute code over a network. This use-after-free vulnerability has a CVSS score of 8.1 and is considered HIGH severity. Microsoft has released a patch for this vulnerability. The vulnerability exists in the Windows Secure Socket Tunneling Protocol (SSTP) and allows an unauthorized attacker to execute code over a network. This is a use-after-free vulnerability, which can be exploited by sending a specially crafted request to the SSTP server. System administrators and users of Windows operating systems, particularly those using Windows 10, Windows 11, and Windows Server, should be aware of this vulnerability and take steps to patch their systems.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 8.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

Who should care

System administrators and users of Windows operating systems, particularly those using Windows 10, Windows 11, and Windows Server, should be aware of this vulnerability and take steps to patch their systems. The vulnerability can be exploited by unauthorized attackers, and patching is essential to prevent exploitation.

Technical summary

The vulnerability exists in the Windows Secure Socket Tunneling Protocol (SSTP) and allows an unauthorized attacker to execute code over a network. This is a use-after-free vulnerability, which can be exploited by sending a specially crafted request to the SSTP server. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. The vulnerability has a high CVSS score of 8.1, indicating a high severity.

Defensive priority

High priority should be given to patching this vulnerability, as it allows for remote code execution and has a high CVSS score.

Recommended defensive actions

  • Apply the patch released by Microsoft
  • Review and update vulnerability management processes
  • Conduct a thorough inventory of affected systems
  • Implement compensating controls, such as network segmentation and monitoring
  • Review relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-14T17:17:02.327Z and was last modified on 2026-07-16T12:45:57.170Z. The NVD entry is currently Analyzed. The vulnerability details are based on the information available from the CVE record and NVD entry. However, the scope and impact of the vulnerability may not be fully understood, and defenders should verify the affected systems and implement necessary mitigations. The evidence is limited, and further verification is required to ensure the accuracy of the information.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50694 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50694

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-50694 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50694

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.