CVE-2026-84192highCWE-79

CVE-2026-84192: high-severity vulnerability in librenms

LibreNMS before 26.3.1 Stored XSS via SNMP/Syslog Data

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.1epss 0.3%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
librenms · librenms
Related CVEs — librenms

In the same product, most dangerous first.

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