High MSRC-CVE-2026-56645 1 CVE

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

Published Jul 3, 2026 · Updated Jul 3, 2026

Vendor: Microsoft

Summary

Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

What is the version information for this release?
150.0.4078.48: 150.0.4078.48, 07/03/2026: 07/03/2026, 150.0.7871.47: 150.0.7871.47

Security updates
150.0.4078.48 — https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security

Vulnerabilities 1

High 8.8

CVE-2026-56645

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Microsoft Microsoft Edge (Chromium-based) Browsers

Jul 3, 2026

Revision history

2026-07-03 #1
Information published.

References

CVE-2026-56645 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56645
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss