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Fencer Vulns
critical 9.0

CVE-2019-4279 in the critical feed json

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…

published 2019-05-17 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-13886

cvss
9.0
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
79.9%
EPSS 79.9% chance of exploitation in 30 days, percentile 99.6%
public exploits
2
Metasploit, Exploit-DB

Summary

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.

Timeline

  1. First public exploit (Metasploit exploit/windows/ibm/ibm_was_dmgr_java_deserialization_rce)
  2. Published

Exploit prediction

79.93% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.0 9.0 CVSS:3.0/S:C/A:H/AC:H/I:H/C:H/AV:N/PR:N/UI:N/RL:O/RC:C/E:U
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.0 9.0 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • IBM WebSphere Application Server

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.