What is CVE-2025-36038?

CVE-2025-36038 is a critical-severity vulnerability in Ibm Websphere Application Server, classified under Deserialization of Untrusted Data. CVSS score: 9.0/10. Published 2025-06-25.

How severe is CVE-2025-36038?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Is CVE-2025-36038 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Ibm Websphere Application Server

CVE-2025-36038

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.

Vulnerability class: Insecure Deserialization

EPSS: 0.010 (77.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Ibm Websphere Application Server — versions 8.5, 9.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

tanjiti/sec_

References

www.ibm.com/support/pages/node/7237967 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2025-36038?: CVE-2025-36038 is a critical-severity vulnerability in Ibm Websphere Application Server, classified under Deserialization of Untrusted Data. CVSS score: 9.0/10. Published 2025-06-25.
How severe is CVE-2025-36038?: Critical severity. CVSS v3 base score is 9.0 out of 10.
Is CVE-2025-36038 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.