# CVE-2026-18490

Unauthenticated RCE via Java deserialization in IBM FTM PayDir RMI SSL endpoint

- Page: https://www.vulneraibility.com/cve/CVE-2026-18490
- CVSS: 8.8
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 0.80% (percentile 56.9)
- CISA SSVC: exploitation none, automatable no, technical impact total (assessed 2026-09-23)
- Weakness: CWE-502
- Published: 2026-09-23

## Affected versions

- IBM Financial Transaction Manager (FTM) for RedHat OpenShift: affected >= 4.0.6.0 and <= 4.0.10.0

A version outside these ranges is not a statement that it is unaffected.

## Impact

Unauthenticated remote code execution via crafted serialized payload; exposes PayDir credentials and allows modification of payment business rules.

## Action

Immediate action required

## Recommendation

Isolate PayDir RMI, block access via network controls, monitor for exploitation, apply vendor patch when released

## References

- [patch] https://www.ibm.com/support/pages/node/7288641

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.