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HIGH · CVSS 7.2 CISA Known Exploited Vulnerability

CVE-2018-9276

Paessler PRTG Network Monitor OS Command Injection Vulnerability

Paessler PRTG Network Monitor

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
7.2
HIGH
EPSS
87%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
2 Jul 2018
CWE-78

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 4 February 2025. US federal agencies were required to remediate it by 25 February 2025.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 87%, which is higher than 99.7% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Frequently asked questions

Is CVE-2018-9276 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2018-9276.

What does CVE-2018-9276 affect?

CVE-2018-9276 affects Paessler PRTG Network Monitor. 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 is rated HIGH with a CVSS base score of 7.2. EPSS puts the probability of exploitation in the next 30 days at 87%, higher than 99.7% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 25 February 2025.

How should organisations respond to CVE-2018-9276?

Apply the vendor patch for Paessler PRTG Network Monitor as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.