CVE-2020-4589

CRITICALNVD 9.89.8—

9.8

IBM WebSphere Application Server 7.0, 8.0, 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 from untrusted sources. IBM X-Force ID: 184585.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 91.5%
KEV: Not listed

Published

August 13, 2020

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated May 27, 2026

No patch confirmed yet.

generic

Security Bulletin: WebSphere Application Server is vulnerable to a remote code execution vulnerability (CVE-2020-4589)

https://www.ibm.com/support/pages/node/6258333

generic

IBM X-Force Exchange

https://exchange.xforce.ibmcloud.com/vulnerabilities/184585

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 16× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 00:17 UTCEG score recompute
2026-05-27 00:17 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch

Frequently asked(5)

What is CVE-2020-4589?

CVE-2020-4589 is a critical vulnerability published on August 13, 2020. IBM WebSphere Application Server 7.0, 8.0, 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 from untrusted sources. IBM X-Force ID: 184585.

When was CVE-2020-4589 disclosed?

CVE-2020-4589 was first published in the National Vulnerability Database on August 13, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-4589 actively exploited?

CVE-2020-4589 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-4589?

CVE-2020-4589 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2020-4589?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-4589, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2020-4589

📅 Published

🔄 Last Modified

📋 Advisory Details (2)