CVE-2025-36038CWE-502

IBM WebSphere Application Server code execution

Critical · published June 25, 2025

CVSS v3.1
9.0
EPSS
13%
Percentile
96.4
In the wild
Unconfirmed
What it is

🚨 A crafty sequence of serialized objects could let an attacker execute arbitrary code on IBM WebSphere Application Server—no login required! 🔥 Think of it like a hacker slipping a fake package into a delivery truck that opens the door to your entire warehouse. If the truck doesn’t check the package carefully, the intruder can gain access to everything inside! An attacker could unleash chaos by executing arbitrary code, potentially compromising sensitive data, altering configurations, or even taking complete control of the system. The consequences could be absolutely devastating, especially for services relying on WebSphere!

Put simply

Think of it like a hacker slipping a fake package into a delivery truck that opens the door to your entire warehouse. If the truck doesn’t check the package carefully, the intruder can gain access to everything inside! This vulnerability arises from improper handling of serialized objects in IBM WebSphere Application Server 8.5 and 9.0, allowing unauthorized code execution if a remote attacker crafts a malicious sequence of them.

What to do

An attacker could unleash chaos by executing arbitrary code, potentially compromising sensitive data, altering configurations, or even taking complete control of the system. The consequences could be absolutely devastating, especially for services relying on WebSphere! To safeguard your systems, patch to the latest version of IBM WebSphere Application Server as soon as possible. Regularly audit your application settings and review your security policies to prevent unauthorized access. Don't forget to monitor for any unusual behavior! You've got this! With the right steps, you can secure your systems and protect your organization from potential threats. 🛡️

The record
Technical detail
CVSS v3.1
9.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.13306 · 96.4th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2025-06-25T20:38Z
EPSS history
Timeline
  • 25 JUN 20:38Z
    IBM WebSphere Application Server code execution
    cvelistv5