VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVReported exploited: VulnCheck KEV since Published CVSS 9.8 criticalEPSS 34.7% probability of exploitation in 30 days
IBM

CVE-2020-4450: IBM WebSphere Application Server 8.5 and 9.0 traditional could allow a remote attacker to execute arbitrary code on t…

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .

VulnCheck KEV lists it since . It cites 1 public report, the first from .

How likely is exploitation in the next 30 days?
34.7%

Up from 34.2% on .

EPSS score, percentile 98.4 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?
9.8 Critical

CVSS v3.0 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

  • 8.5
  • 9.0

Versions by product

Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

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.

Source: CVE List, as of . About the data.

What to do

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Versions by product, as listed in the CVE record (1 product)
IBM WebSphere Application Server
StatusVersions
Affected8.5
Affected9.0

Source: CVE List, as of . About the data.

Timeline

DateEvent
CVE record published
CVE record last updated

References

3

Known exploited IBM vulnerabilities

  • CVE-2026-9198: IBM Langflow Code Injection Vulnerability (added )
  • CVE-2022-47986: IBM Aspera Faspex Code Execution Vulnerability (added )
  • CVE-2013-3993: IBM InfoSphere BigInsights Invalid Input Vulnerability (added )
  • CVE-2015-7450: IBM WebSphere Application Server and Server Hypervisor Edition Code Injection. (added )
  • CVE-2019-4716: IBM Planning Analytics Remote Code Execution Vulnerability (added )