CVE-2019-4279

CRITICALNVD 9.89.8—Weaponized

9.8

IBM WebSphere Application Server 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: 160445.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 99.3%
KEV: Not listed

Published

May 17, 2019

Last Modified

November 21, 2024

References (6)

psirt@ushttp://www.securityfocus.com/bid/108450
psirt@ushttps://exchange.xforce.ibmcloud.com/vulnerabilities/160445
psirt@ushttps://www.ibm.com/support/docview.wss?uid=ibm10883628
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/108450
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/160445
af854a3a-2127-422b-91ae-364da2661108https://www.ibm.com/support/docview.wss?uid=ibm10883628

Weakness Classification(1)

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

CWE-502Deserialization of Untrusted Data

Data Freshness Timeline

(refreshed 6× in last 7d / 12× 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
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 19:27 UTCEG score recompute
2026-05-27 19:27 UTCGHSA enrichment
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-23 03:57 UTCOSV refresh

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Metasploit module) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-46969✓ verified
First seen Jun 5, 2019
IBM Websphere Application Server - Network Deployment Untrusted Data Deserialization Remote Code Execution (Metasploit)
Open source ↗
Metasploitexploit/windows/ibm/ibm_was_dmgr_java_deserialization_rce✓ verified
First seen May 15, 2019
IBM Websphere Application Server Network Deployment Untrusted Data Deserialization Remote Code Execution
Open source ↗

Frequently asked(5)

What is CVE-2019-4279?

CVE-2019-4279 is a critical vulnerability published on May 17, 2019. IBM WebSphere Application Server 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: 160445.

When was CVE-2019-4279 disclosed?

CVE-2019-4279 was first published in the National Vulnerability Database on May 17, 2019, 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-2019-4279 actively exploited?

CVE-2019-4279 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-4279?

CVE-2019-4279 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2019-4279?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-4279, 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-2019-4279

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-4279?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)