Is CVE-2026-84192 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-84192?

CVE-2026-84192 has a CVSS v3 severity of HIGH (7.1).

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CVE-2026-84192

Description

LibreNMS before 26.3.1 contains a stored cross-site scripting vulnerability in legacy PHP templates that output SNMP-sourced and syslog-sourced data without escaping. An attacker who controls a monitored network device can inject arbitrary JavaScript through SNMP interface descriptions or syslog program fields that executes when authenticated users view affected pages.