A Write to Arbitrary Location in Disk vulnerability exists in PRTG Network Monitor 19.1.49 and below that allows attackers to place files i…

published 2020-03-17 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-2779

cvss: 7.2; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 4.5%; EPSS 4.5% chance of exploitation in 30 days, percentile 91%
public exploits: 0; none known

A Write to Arbitrary Location in Disk vulnerability exists in PRTG Network Monitor 19.1.49 and below that allows attackers to place files in arbitrary locations with SYSTEM privileges (although not controlling the contents of such files) due to insufficient sanitisation when passing arguments to the phantomjs.exe binary. In order to exploit the vulnerability, remote authenticated administrators need to create a new HTTP Full Web Page Sensor and set specific settings when executing the sensor.

Exploit prediction

4.54% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

sensepost.com https://sensepost.com/blog/2019/being-stubborn-pays-off-pt.-1-cve-2018-19204/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C

Classification

Weakness

CWE-434 Unrestricted Upload of File with Dangerous Type

References

sensepost.com /blog/2019/being-stubborn-pays-off-pt.-1-cve-2018-19204/
exploit, third-party-advisory
paessler.com /prtg/history/stable
release-notes, vendor-advisory
how2itsec.blogspot.com /2019/10/security-fixes-in-prtg-1935152.html
release-notes, third-party-advisory

Sources

CVE List CVE-2019-11074
NVD CVE-2019-11074

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary