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CVE-2018-9276

Paessler PRTG Network Monitor OS Command Injection

7.2 HIGHActively exploited (CISA KEV)Public exploitEPSS 87.0%
  1. Published2 Jul 2018
  2. Added to CISA KEV4 Feb 2025
  3. Remediation due25 Feb 2025
Actively exploited (CISA KEV)

Paessler PRTG Network Monitor contains an OS command injection vulnerability that allows an attacker with administrative privileges to execute commands via the PRTG System Administrator web console.

Added to KEV: 4 Feb 2025Federal remediation due: 25 Feb 2025

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

Paessler Prtg Network Monitor> 19.3.52 < 21.2.68 · < 18.2.39

Remediation

Fixed in
Paessler Prtg Network Monitor≥ 21.2.68

References

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Frequently asked

Is CVE-2018-9276 being actively exploited?

Yes. CVE-2018-9276 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 4 Feb 2025.

How severe is CVE-2018-9276?

CVE-2018-9276 has a CVSS 3.1 base score of 7.2, rated high. EPSS estimates a 87.0% probability of exploitation.

Which products are affected by CVE-2018-9276?

Affected products include Paessler Prtg Network Monitor.

How do I fix CVE-2018-9276?

Upgrade affected software to a fixed version, for example Paessler Prtg Network Monitor 21.2.68 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2018-9276 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.