CVE-2026-48553
Last modified
CVE-2026-48553 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. 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.
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/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Nagios Enterprises, LLC. | Nagios Core | < 4.5.13 |
| Nagios Enterprises, LLC. | Nagios XI | < 2026R1.5 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-48553?
How severe is CVE-2026-48553?
How do I fix CVE-2026-48553?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-48545Gradio before version 6.15.0 contains a cookie injection vul…6.8
- CVE-2026-48546KanaDojo before 0.1.18 contains a sandbox escape vulnerabili…8.5
- CVE-2026-48547KanaDojo contains a command injection vulnerability that all…8.5
- CVE-2026-48550Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are …6.1
- CVE-2026-48551Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 cont…7.4
- CVE-2026-48552Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are …5.4
- CVE-2026-48554Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are …7.7
- CVE-2026-48555Spatie Laravel Media Library before version 11.23.0 contains…7.4
- CVE-2026-48556Rejected reason: This CVE ID has been rejected or withdrawn …
- CVE-2026-48557Spatie Laravel Media Library before version 11.23.0 contains…8.8
- CVE-2026-48558SimpleHelp versions 5.5.15 and prior and 6.0 pre-release ver…10
- CVE-2026-48559Lightweight Music Server (LMS) though 3.76.0 contains a stor…5.4
Are you affected by CVE-2026-48553?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST