CVE-2026-45497CriticalMonitor
Microsoft M365 Copilot Remote Code Execution Vulnerability
Severity Critical · Urgency Monitor
Why it matters: Critical severity (CVSS 7.7)
Remote Code Execution · Critical · CVSS 7.7. Affects: Microsoft 365 Copilot.
Affected: Microsoft 365 Copilot
Change history
2026-06-23 · First seen