CVE-2025-25005: Microsoft Exchange Server

Medium severity, CVSS 6.5. EPSS: 1.4% chance of exploitation in the next 30 days.

Improper input validation in Microsoft Exchange Server allows an authorized attacker to perform tampering over a network.

Affected products

• Microsoft Exchange Server: version 2016 only; version 2019 only
• Microsoft Exchange Server Subscription Edition: before 15.02.2562.020 (fixed in 15.02.2562.020)

Published 2025-08-12. Last modified 2026-06-17.