VULNERABILITY INTELLIGENCE

CVE-2026-48553

CVSS score7.5 HIGH
EPSS probability0.97%
CISA KEVNot currently listed
Published2026-08-12
Last modified2026-09-08
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-78

Primary references