CVE-2026-48553: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in Nagios Enterprises, LLC. Nagios Core
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.
CVE-2026-48553: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in Nagios Enterprises, LLC. Nagios Core
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.
CVSS v4.0
Score 7.7high
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-05-21T18:34:46.418Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7ca94fbf8831d539e05c72
Added to database: 08/12/2026, 17:11:43 UTC
Last updated: 08/12/2026, 17:11:43 UTC
Views: 1
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