CVE-2020-4450

Name: CVE-2020-4450
Creator: NVD / NIST
Published: 2020-06-05T17:15:11.437+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 33.94%

Last modified Jun 17, 2026

CVE-2020-4450 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. IBM WebSphere Application Server 8.5 and 9.0 traditional could allow a remote attacker to execute arbitrary code on the system with a specially-crafted sequence of serialized objects. IBM X-Force ID: 181231.. EPSS estimates a 33.94% chance of exploitation in the next 30 days.

Description

IBM WebSphere Application Server 8.5 and 9.0 traditional could allow a remote attacker to execute arbitrary code on the system with a specially-crafted sequence of serialized objects. IBM X-Force ID: 181231.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

33.94%

98.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Ibm	Websphere Application Server	>= 8.5.0.0, < 8.5.5.18
Ibm	Websphere Application Server	>= 9.0.0.0, < 9.0.5.5

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/181231VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6220294Patch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-689/Third Party Advisory, VDB Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/181231VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6220294Patch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-689/Third Party Advisory, VDB Entry

Timeline

Published: Jun 5, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-4450?

How severe is CVE-2020-4450?

CVE-2020-4450 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 33.94% probability of exploitation in the next 30 days.

How do I fix CVE-2020-4450?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-4450?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST