How severe is CVE-2018-9276?

CVE-2018-9276 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-9276 being actively exploited?

Yes. CVE-2018-9276 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-02-04, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2018-9276?

CVE-2018-9276 affects Paessler Prtg Network Monitor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-9276?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2018-9276 have an EU (EUVD) identifier?

Yes. CVE-2018-9276 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-20870. It is also flagged as exploited in the EUVD (since 2025-02-04).

When was CVE-2018-9276 published?

CVE-2018-9276 was published on 2018-07-02 and last updated on 2026-06-17.

CVE-2018-9276

CVE-2018-9276 is a high-severity vulnerability in Paessler Prtg Network Monitor with a CVSS 3.x base score of 7.2. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-02-04). The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 87% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-02-04)
EU (EUVD) id: EUVD-2018-20870
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-02-04)
Weakness: CWE-78
Affected product: Paessler Prtg Network Monitor
Published: 2018-07-02
Last modified: 2026-06-17

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.

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 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-9276 being actively exploited?: Yes. CVE-2018-9276 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-02-04, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2018-9276?: CVE-2018-9276 affects Paessler Prtg Network Monitor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-9276?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2018-9276 have an EU (EUVD) identifier?: Yes. CVE-2018-9276 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-20870. It is also flagged as exploited in the EUVD (since 2025-02-04).
When was CVE-2018-9276 published?: CVE-2018-9276 was published on 2018-07-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:paessler:prtg_network_monitor:*:*:*:*:*:*:*:*

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