CVE-2019-4279

CRITICAL

IBM WebSphere App Server <9.0 - RCE

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2019-4279. PoCs published by b0yd, including Metasploit module exploits/windows/ibm/ibm_was_dmgr_java_deserialization_rce.

AI-analyzed exploit summary This Metasploit module exploits a deserialization vulnerability in IBM WebSphere Application Server Network Deployment (CVE-2019-4279) to achieve remote code execution. It constructs malicious serialized objects to execute arbitrary commands or upload payloads.

Description

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.

Exploits (2)

exploitdb WORKING POC
rubyremotewindows
https://www.exploit-db.com/exploits/46969

This Metasploit module exploits a deserialization vulnerability in IBM WebSphere Application Server Network Deployment (CVE-2019-4279) to achieve remote code execution. It constructs malicious serialized objects to execute arbitrary commands or upload payloads.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: IBM WebSphere Application Server Network Deployment
No auth needed
Prerequisites: Network access to the target server · IBM WebSphere Application Server Network Deployment running with vulnerable configuration
devstral-2 · analyzed Feb 19, 2026 Full analysis →
metasploit WORKING POC EXCELLENT
by b0yd · rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/ibm/ibm_was_dmgr_java_deserialization_rce.rb

This Metasploit module exploits a Java deserialization vulnerability in IBM WebSphere Application Server Network Deployment (CVE-2019-4279) to achieve remote code execution. It constructs malicious serialized objects to add a neighbor node and broadcast a task, ultimately executing arbitrary commands or payloads on the target system.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: IBM WebSphere Application Server Network Deployment
No auth needed
Prerequisites: Network access to the target server on specific ports (e.g., 11006) · SSL/TLS negotiation capabilities
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (3)

Core 3
Core References
Vendor Advisory x_refsource_confirm
https://www.ibm.com/support/docview.wss?uid=ibm10883628
VDB Entry, Vendor Advisory vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/160445
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/108450

Scores

CVSS v3 9.8
EPSS 0.8365
EPSS Percentile 99.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-502
Status published
Products (2)
ibm/websphere_application_server 7.0.0.0
ibm/websphere_application_server 8.5.0.0 - 8.5.5.15
Published May 17, 2019
Tracked Since Feb 18, 2026