known ransomware use

Red Hat JBoss Application Server Remote Code Execution Vulnerability

Added to KEV
2021-12-10
Federal due date
2022-06-10
Vendor
Red Hat
Product
JBoss Application Server
EPSS
99.9th percentile (score 0.943, as of 2026-06-08)
NVD CVSS v3.1
Ransomware use
Known
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2017-12149

CISA short description

The JBoss Application Server, shipped with Red Hat Enterprise Application Platform 5.2, allows an attacker to execute arbitrary code via crafted serialized data.

Required action

Apply updates per vendor instructions.

EPSS percentile is the FIRST.org exploit-probability ranking as of the date noted above; it moves daily. CVSS reflects NVD's analysis at time of publication.