🔴 Critical | Source: Microsoft Security Response Center
A heap-based buffer overflow vulnerability in Microsoft Edge (Chromium-based) allows an unauthenticated attacker to execute arbitrary code remotely over a network. This type of flaw can be exploited without requiring the victim to take any action beyond having a vulnerable browser version in use. The risk is significant in enterprise environments where Edge is widely deployed, particularly on systems with access to cloud management portals and sensitive resources.
Security Architect’s Take: Prioritise rapid patching of Microsoft Edge across all endpoints, with particular urgency for privileged users and those accessing Azure or other cloud consoles — consider enforcing browser version compliance via Intune or equivalent MDM tooling until patched versions are confirmed deployed.
Original advisory: CVE-2026-56645 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability