{"apiVersion":"1.0","identifier":"CVE-2026-48553","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.","publishedAt":"2026-08-12T17:17:27","lastModifiedAt":"2026-08-12T20:17:44","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-48553","cvssScore":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00523,"riskScore":0.79,"affectedProduct":"Nagios Core","affectedVersions":"<4.5.13","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-48553","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-48553","en":"https://www.redsauce.net/en/cves/CVE-2026-48553","fr":"https://www.redsauce.net/fr/cves/CVE-2026-48553","pt":"https://www.redsauce.net/pt/cves/CVE-2026-48553","de":"https://www.redsauce.net/de/cves/CVE-2026-48553","sk":"https://www.redsauce.net/sk/cves/CVE-2026-48553","el":"https://www.redsauce.net/el/cves/CVE-2026-48553"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-48553"}}