Assessment
Why it matters
EPSS is 0.8%; technical severity is CVSS 9.8.
IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5, 9.0 IBM WebSphere Application Server and WebSphere Application Server Liberty are vulnerable to remote code execution in the Web Server Plug-ins, through a specially crafted request.
Who should care
- Teams operating Websphere Application Server
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Websphere Application Server is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- IBM Security advisory 7274072
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-94
- Affected versions
- IBM Websphere Application Server (Start Including 8.5.0.0, End Including 8.5.5.29 | Start Including 8.5.0.0, End Including 8.5.5.29 | Start Including 9.0.0.0, End Including 9.0.5.27 | Start Including 9.0.0.0, End Including 9.0.5.27)
- Fixed versions
- No explicit fixed version is currently recorded.
- Published
- 26 May 2026
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
Signal timeline
- CVE published
- Latest EPSS score: 0.8%
- Signal calculated at 15