---
title: "CVE-2018-19410: Paessler PRTG Network Monitor Local File Inclusion Vulnerability"
url: https://erroneo.us/security/cve/CVE-2018-19410/
description: "CVE-2018-19410 (Paessler PRTG Network Monitor): Exploited in the wild (CISA KEV). PRTG Network Monitor before 18.2.40.1683 allows remote unauthenticated…"
type: vulnerability-record
section: "Security Digest"
date_published: 2018-11-21
date_modified: 2025-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2018-19410"
kev: true
cvss: 9.8
epss: 0.97939
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2018-19410: Paessler PRTG Network Monitor Local File Inclusion Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Paessler PRTG Network Monitor. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-02-04, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-02-25 ; treat that as the outer limit, not the target.
- EPSS 97.9% , percentile 99.9: FIRST’s model estimates a 97.9% chance of exploitation activity in the next 30 days, higher than 99.9% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.

## What it is

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).

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2025-02-04; federal due date 2025-02-25. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 97.94% probability of exploitation activity in the next 30 days; percentile 99.9.

## Sources

- [Listed in CISA KEV notes (paessler.com)](https://www.paessler.com/prtg/history/prtg-18#18.2.41.1652)
- [CVE.org record CVE-2018-19410](https://www.cve.org/CVERecord?id=CVE-2018-19410)
- [NVD entry CVE-2018-19410](https://nvd.nist.gov/vuln/detail/CVE-2018-19410)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-19410)
- [ptsecurity.com](https://www.ptsecurity.com/ww-en/analytics/threatscape/pt-2018-24/)

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Source page: https://erroneo.us/security/cve/CVE-2018-19410/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt