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NVD description
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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
CVE-2026-48553 Authenticated RCE in Nagios Core and XI via NRDP Custom Variable Macro Injection https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-48553
Post summary
CVE-2026-48553 reveals an authenticated remote code execution flaw in Nagios Core and XI, caused by NRDP custom variable macro injection; no PoC, exploit, or patch details are currently available.