# CVE-2018-9276: Paessler PRTG Network Monitor OS Command Injection Vulnerability

Source: https://junglewise.ai/threats/cve-2018-9276-paessler-prtg-network-monitor-os-command-injection-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-02-04. Updated: 2026-05-09  
License: CC BY 4.0 with a link back

CVE-2018-9276 · Severity: critical · CVSS 7.2 · Exploited in the wild · Published 2025-02-04

Paessler PRTG Network Monitor contains an OS command injection vulnerability in its sensor and notification management components. An authenticated attacker with administrative privileges can execute arbitrary commands on the server or connected devices by sending malformed parameters through the PRTG System Administrator web console.

Technologies: [Paessler PRTG Network Monitor](https://junglewise.ai/threats/technologies/prtg-network-monitor). Vendors: [Paessler](https://junglewise.ai/threats/vendors/paessler).

## Quick answers

**Is CVE-2018-9276 exploited in the wild?** Yes. CVE-2018-9276 is known to be exploited in the wild, first recorded on 4 February 2025. Treat it as urgent.

**How severe is CVE-2018-9276?** Critical severity, with a CVSS score of 7.2, published 4 February 2025.

**Which products and versions are affected?** Paessler PRTG Network Monitor before 18.2.39.

**Is there a fix for CVE-2018-9276?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2018-9276 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2018-9276?** Check whether you run Paessler PRTG Network Monitor. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Paessler PRTG Network Monitor before 18.2.39

## Timeline

- 2018-06-26: disclosed: Initial public disclosure via Packet Storm
- 2025-02-04: kev added: Added to CISA Known Exploited Vulnerabilities (KEV) Catalog
- 2025-02-04: exploited: CISA confirmed exploitation in the wild

## Related threats

- [Paessler PRTG Network Monitor password disclosure in demo sensor](https://junglewise.ai/threats/cve-2026-4638-prtg-network-monitor-before-version-26-2-120-1449-ships-a-demo-exe)
- [Paessler PRTG Network Monitor reflected XSS in error responses](https://junglewise.ai/threats/cve-2026-4637-paessler-prtg-network-monitor-before-version-26-2-120-1449-is)
- [Paessler PRTG cross-site scripting in body class](https://junglewise.ai/threats/cve-2023-28148-paessler-prtg-cross-site-scripting-in-body-class)
- [Paessler PRTG Network Monitor arbitrary file write via FTP Server Count Sensor](https://junglewise.ai/threats/cve-2023-22632-paessler-prtg-network-monitor-arbitrary-file-write-via-ftp-server)
- [Paessler PRTG Network Monitor arbitrary file write in HTTP XML/REST Sensor](https://junglewise.ai/threats/cve-2023-22631-paessler-prtg-network-monitor-arbitrary-file-write-in-http-xml)