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CVE-2018-19410

9.8, critical Known exploited

Paessler PRTG Network Monitor Local File Inclusion Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
9.8, critical critical CVSS v3.1
EPSS, next 30 days
98% higher than 99.9% of scored CVEs
Exploitation
Confirmed in the wild
Published
21 Nov 20187 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 4 Feb 2025. US federal agencies had to remediate by 25 Feb 2025, a deadline that has passed.

Required action. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Description

PRTG Network Monitor before 18.2.40.1683 allows remote unauthenticated attackers to create users with read-write privileges (including administrator). A remote unauthenticated user can craft an HTTP request and override attributes of the 'include' directive in /public/login.htm and perform a Local File Inclusion attack, by including /api/addusers and executing it. By providing the 'id' and 'users' parameters, an unauthenticated attacker can create a user with read-write privileges (including administrator).

Details

Vendor
Paessler
Product
Prtg Network Monitor
Weakness
n/a
Status
Analyzed
Updated
17 Jun 2026
Assigner
cve@mitre.org

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

References 2

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Paessler CVEs

Every Paessler CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2018-9276 Paessler PRTG Network Monitor OS Command Injection Vulnerability KEV EPSS 87% 7.2, high

Beyond this page

Is CVE-2018-19410 in your network?

This page tells you how dangerous CVE-2018-19410 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2018-19410 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 16 Oct 2026, not the live upstream state.