CVE-2026-84192
LibreNMS before 26.3.1 Stored XSS via SNMP/Syslog Data
CVSS Score
7.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | librenms |
| Product | librenms |
| Published | Sep 1, 2026 |
| Last Updated | Oct 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
Affected Versions
librenms / librenms
0 < 26.3.1
References
Credits
🔍 TristanInSec