CVE-2018-9276
HighExploitedPublic exploitAn 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.
Published Jul 2, 2018 · Updated Nov 6, 2025
Key Facts
Patch immediately- CVE-2018-9276 is a high-severity vulnerability (CVSS 7.2 v3.1) affecting Prtg Network Monitor (Paessler).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 4, 2025. Public exploit code is available.
- EPSS estimates a 87% probability of exploitation in the next 30 days.
- Fixed versions are available, including Prtg Network Monitor 18.2.39.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.2
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
87%
Higher than 99.7% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2018-9276 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Feb 4, 2025 | Feb 25, 2025 | Not reported |
| Industry KEV feed | Feb 4, 2025 | Feb 25, 2025 | Not reported |
| CIRCL KEV | Feb 4, 2025 | Feb 25, 2025 | Not reported |
| ENISA EUVD | Feb 4, 2025 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Prtg Network MonitorPaessler | See advisory | 18.2.39 |
Patched Releases
Prtg Network Monitor
18.2.39
Timeline
Publicly disclosed
Jul 2, 2018
Added to CISA KEV
Feb 4, 2025
Added to Industry KEV feed
Feb 4, 2025
Added to CIRCL KEV
Feb 4, 2025
Added to ENISA EUVD
Feb 4, 2025
Last updated
Nov 6, 2025
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
- advisory20180626 PRTG < 18.2.39 Command Injection
- exploithttp://packetstormsecurity.com/files/148334/PRTG-Command-Injection.html
- exploithttp://packetstormsecurity.com/files/161183/PRTG-Network-Monitor-Remote-Code-Execution.html
- exploitMSF prtg_authenticated_rce.rb
- exploitVulnCheck exploitation report
FAQ
Common Questions.
An issue was discovered in PRTG Network Monitor before 18.2.39.
Affected: Prtg Network Monitor (Paessler). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 4, 2025.
Yes. It was added on Feb 4, 2025 with a federal remediation due date of Feb 25, 2025.
Public exploit code is available.
Fixed versions are available, including Prtg Network Monitor 18.2.39.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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