Paessler PRTG Network Monitor OS Command Injection Vulnerability
n/a — n/a
An issue was discovered in PRTG Network Monitor before 18.2.39. An attacker who has access to the PRTG System Administrator web console with administrative privileges can exploit an OS command injection vulnerability (both on the server and on devices) by sending malformed parameters in sensor or notification management scenarios.
7.2
87.2%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Published
- Jul 2, 2018
- Modified
- Oct 21, 2025
- Added to KEV
- Feb 4, 2025
- Federal patch due
- Feb 25, 2025
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2018-9276, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2018-9276 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2018-9276?
An issue was discovered in PRTG Network Monitor before 18.2.39. An attacker who has access to the PRTG System Administrator web console with administrative privileges can exploit an OS command injection vulnerability (both on the server and on devices) by sending malformed parameters in sensor or notification management scenarios.
How severe is CVE-2018-9276?
CVE-2018-9276 has a CVSS base score of 7.2 out of 10 (CVSS 3.1).
Is CVE-2018-9276 actively exploited in the wild?
Yes. CVE-2018-9276 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Feb 4, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2018-9276?
87.2% - meaning FIRST.org's EPSS model estimates a 87.2% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
What type of vulnerability is CVE-2018-9276?
CVE-2018-9276 is classified under CWE-78 (CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')).
Cross-checked against
Impactr finds and proves whether CVE-2018-9276 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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