CVE-2025-25007: Microsoft Exchange Server

Medium severity, CVSS 5.3. EPSS: 0.9% chance of exploitation in the next 30 days.

Improper validation of syntactic correctness of input 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 15.02.2562.020 (fixed in 15.02.2562.020)

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