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01 Record

CVE-2020-4450

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:

CriticalPUBLISHEDCNA: ibm
CNA base score9.8 CVSS v3.xCVSS:3.0/UI:N/AV:N/C:H/PR:N/AC:L/I:H/S:U/A:H/RL:O/E:U/RC:C
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02 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:

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
34.17% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 98.2% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2020-06-05 12:55Z6 YR AGO
Last updated
2024-09-16 22:30Z2 YR AGO
Reserved
2019-12-30
Assigning CNA
ibm
Record state
PUBLISHED
Severity
Critical (CVSS 9.8)
CNA CVSS vector
CVSS:3.0/UI:N/AV:N/C:H/PR:N/AC:L/I:H/S:U/A:H/RL:O/E:U/RC:C
Weaknesses
  • CWE-502Deserialization of Untrusted DataBase
Data version
5.1
Document digest
4ba538cb0c85a3970b438ee7d73d8aa2b820993a4f23a3776b60f94db52fda98

05 Affected products

VendorProductVersionsPlatforms
IBMWebSphere Application Server8.5, 9.0—

06 References