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CVE-2026-48553: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in Nagios Enterprises, LLC. Nagios Core

0
High
VulnerabilityCVE-2026-48553cvecve-2026-48553
Published: 08/12/2026 (08/12/2026, 16:46:35 UTC)
Source: CVE Database V5
Vendor/Project: Nagios Enterprises, LLC.
Product: 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

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
High
Vuln. Availability
High
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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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