PRTG Network Monitor - Authentication Bypass (CVE-2018-19410)

CVE-2018-19410 is a high-severity vulnerability in PRTG Network Monitor that allows remote unauthenticated attackers to escalate privileges by leveraging file inclusion through crafted requests.

CrowdSec has been tracking this vulnerability and its exploits since 28th of May 2025.

Data from the CrowdSec community indicates that exploitation of CVE-2018-19410 is highly selective and intelligence-driven. Threat actors use advanced reconnaissance and carefully choose their targets, often as part of sophisticated campaigns or advanced persistent threat operations. CrowdSec network telemetry also shows that exploitation of CVE-2018-19410 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.

Exploitation attempts can be identified by HTTP requests directed at URLs containing /public/login.htm with patterns that manipulate user creation functionality.