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    <lastBuildDate>Wed, 07 Oct 2026 11:15:06 +0000</lastBuildDate>
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      <title>CVE-2026-48553 — Nagios Core / XI Authenticated RCE via Custom-Variable Macro Injection</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-48553</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Nagios Enterprises, LLC. Nagios Core, Nagios Enterprises, LLC. Nagios XI&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Nagios Enterprises, LLC. Nagios Core, Nagios Enterprises, LLC. Nagios XI&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2026-48553</guid>
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