CVE-2026-56191CriticalMonitor
Microsoft Exchange Online Tampering Vulnerability
Severity Critical · Urgency Monitor
Why it matters: Critical severity (CVSS 10)
Tampering · Critical · CVSS 10. Affects: Exchange Server.
Affected: Exchange Server
← All changes · security · CVE-2026-56191
Severity Critical · Urgency Monitor
Why it matters: Critical severity (CVSS 10)
Tampering · Critical · CVSS 10. Affects: Exchange Server.
Affected: Exchange Server