CVE-2025-64667: Microsoft Exchange Server

Medium severity, CVSS 5.3. EPSS: 0.8% chance of exploitation in the next 30 days.

User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Affected products

• Microsoft Exchange Server: version 2016 only; version 2019 only
• Microsoft Exchange Server Subscription Edition: before 15.02.2562.035 (fixed in 15.02.2562.035)

Published 2025-12-09. Last modified 2026-06-17.