CVE-2026-48553

HighCVSS 7.5/10Last modified Sep 8, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-78

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
Nagios Enterprises, LLC.	Nagios Core	< 4.5.13
Nagios Enterprises, LLC.	Nagios XI	< 2026R1.5

References

Timeline

Published: Aug 12, 2026
Last modified: Sep 8, 2026
NVD status: Awaiting Analysis

Related CVEs from 2026

CVE-2026-485547.5Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to authenticated remote code execution via unfiltered NOTIFICATION-fa CVE-2026-485557.4Spatie Laravel Media Library before version 11.23.0 contains a server-side request forgery vulnerability that allows remote attackers to cau CVE-2026-485578.8Spatie Laravel Media Library before version 11.23.0 contains a file upload restriction bypass in FileAdder::defaultSanitizer(). The sanitize CVE-2026-4855810.0SimpleHelp versions 5.5.15 and prior and 6.0 pre-release versions contain an authentication bypass vulnerability in the OIDC authentication CVE-2026-485595.4Lightweight Music Server (LMS) though 3.76.0 contains a stored cross-site scripting vulnerability that allows attackers to execute arbitrary CVE-2026-485605.4Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.CVE-2026-485619.6Improper neutralization of special elements used in a command ('command injection') in Copilot Chat (Microsoft Edge) allows an unauthorized CVE-2026-485624.6Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized att CVE-2026-485637.5Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.CVE-2026-485648.8Heap-based buffer overflow in Windows DHCP Server allows an authorized attacker to execute code over a network.CVE-2026-485657.8Untrusted search path in Windows Narrator Braille allows an authorized attacker to elevate privileges locally.CVE-2026-485665.5Out-of-bounds read in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.