CVE-2020-4448: IBM WebSphere Application Server

Critical severity, CVSS 9.8. EPSS: 12.2% chance of exploitation in the next 30 days.

IBM WebSphere Application Server Network Deployment 7.0, 8.0, 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 from untrusted sources. IBM X-Force ID: 181228.

Affected products

• IBM WebSphere Application Server: from 8.5.0.0, before 8.5.5.18 (fixed in 8.5.5.18); from 9.0.0.0, before 9.0.5.4 (fixed in 9.0.5.4)
• IBM WebSphere Virtual Enterprise: version 7.0 only; version 8.0 only

Published 2020-06-05. Last modified 2026-06-17.