HIGHVulnerability
Verified
Global

NVD HIGH: CVE-2026-48553 — Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 are vulnerable to authen...

·Source: NIST NVD

Updated:

Executive Summary

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. Expl

Analysis

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. CVSS Score: 7.5. Published: 2026-08-12T17:17:27.697.

Indicators of Compromise (1)

CVE (1)
CVE-2026-48553
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Aug 12, 2026. Verified by: NIST.

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