CVE-2026-50420 Microsoft CVE debrief

Who should care

System administrators and security teams responsible for Windows systems should be aware of this vulnerability and assess their exposure. They should review the CVE record and NVD entry for further details and consider applying vendor patches or updates for Windows HTTP.sys. Additionally, they should implement compensating controls such as monitoring and exception tracking, and conduct inventory checks to identify affected systems.

Technical summary

The vulnerability is an out-of-bounds read in Windows HTTP.sys, which could allow an unauthorized attacker to disclose information locally. The CVSS score is 6.2 with a vector of CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. The weakness is classified as CWE-125. The vulnerability affects Windows systems and has a medium severity level.

Defensive priority

Medium priority due to the potential for local information disclosure. Defenders should prioritize applying vendor patches or updates for Windows HTTP.sys and implementing compensating controls such as monitoring and exception tracking.

Recommended defensive actions

• Review and apply vendor patches or updates for Windows HTTP.sys
• Implement compensating controls such as monitoring and exception tracking
• Conduct inventory checks to identify affected systems
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation and verification are necessary to fully understand the impact and scope of the vulnerability. The evidence is based on the official CVE record and NVD entry, which may have limitations and potential biases. Defenders should verify the information through additional sources and consider the potential for unknown affected scope.

Official resources