CVE-2025-36038: IBM WebSphere Application Server

Critical severity, CVSS 9.8. EPSS: 13.3% chance of exploitation in the next 30 days.

IBM WebSphere Application Server 8.5 and 9.0 could allow a remote attacker to execute arbitrary code on the system with a specially crafted sequence of serialized objects.

Affected products

• IBM WebSphere Application Server: from 8.5, before 8.5.5.28 (fixed in 8.5.5.28); from 9.0, before 9.0.5.25 (fixed in 9.0.5.25)

Published 2025-06-25. Last modified 2026-06-17.