VulnerabilityAnalyzed

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.

CRITICAL 9.8EPSS 13.3%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 13.3%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.

Description

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.

CVSS 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 13.31% probability · 96th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-502
Affected: ibm/websphere application server
Source: psirt@us.ibm.com

EPSS trend

EPSS moved from 13.3% on 26 September 2026 to 13.3% on 1 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

References

https://www.ibm.com/support/pages/node/7237967Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.