CVE-2026-56173 Microsoft CVE debrief

Who should care

Administrators and users of Windows WebView should be aware of this vulnerability, as it allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7 and a severity of HIGH. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor.

Technical summary

A use-after-free vulnerability exists in Windows WebView. An authorized attacker can exploit this vulnerability to elevate privileges locally. The vulnerability has a CVSS score of 7 and a severity of HIGH. The CVE record was published on 2026-07-14T18:18:23.310Z and has not been modified since then. The NVD entry is currently Awaiting Analysis.

Defensive priority

High priority should be given to patching this vulnerability, as it allows for local privilege escalation.

Recommended defensive actions

• Apply patches or updates provided by the vendor
• Monitor systems for suspicious activity
• Implement compensating controls to limit the impact of the vulnerability
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-14T18:18:23.310Z and has not been modified since then. The NVD entry is currently Awaiting Analysis. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor. The vulnerability has a CVSS score of 7 and a severity of HIGH. Administrators and users of Windows WebView should be aware of this vulnerability, as it allows an authorized attacker to elevate privileges locally.

Official resources