CVE-2026-48553 — Nagios Core / XI Authenticated RCE via Custom-Variable Macro Injection
Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 are vulnerable to authenticated remote code execution via custom-variable macro injection through the Nagios Remote Data …
Published: 2026-08-12 · CVSS: 7.7 · CVSS 4.0
Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 are vulnerable to authenticated remote code execution via custom-variable macro injection through the Nagios Remote Data Processor (NRDP). When a custom variable defined on a host, service, or contact is referenced in a shell-executed command line, an authenticated attacker with NRDP access can inject OS commands through the macro value. Exploitation requires a non-default configuration in which a custom variable is defined and referenced in a shell-executed command.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7