CISA KEV · Known exploitedCritical

CVE-2018-19410

Paessler PRTG Network Monitor

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).

CVSS: 9.8
EPSS: 86.6%
CISA KEV: Listed
Published: 2018.11.22

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability86.6%

Technical severityCVSS 9.8

Vulnerability overview

Affected product and versions

Product: Paessler PRTG Network Monitor
Affected versions: < 18.2.40.1683
Fixed versions: 18.2.40.1683

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

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

Due date: 2025.02.25

1
Identify
Confirm that Paessler PRTG Network Monitor and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: Not available
KEV added: 2025.02.04
Ransomware use: 미확인