Security Digest · Vulnerability record · Known exploited
CVE-2018-19410: Paessler PRTG Network Monitor Local File Inclusion Vulnerability
Exploited in the wild (CISA KEV). PRTG Network Monitor before 18.2.40.1683 allows remote unauthenticated attackers to create users with read-write privileges (including administrator).
CISA KEV · added 2025-02-04 CVSS 9.8 Critical EPSS 97.9% · p99.9
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- 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).
CISA’s summary
Paessler PRTG Network Monitor contains a local file inclusion vulnerability that allows a remote, unauthenticated attacker to create users with read-write privileges (including administrator).
Product: Paessler PRTG Network Monitor · Assigned by: mitre · Published: 2018-11-21
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| n/a | n/a | see vendor advisory |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- 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.
Timeline
- — CVE record published by mitre
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (paessler.com) paessler.com
Vulnerability records
- CVE.org record CVE-2018-19410 cve.org
- NVD entry CVE-2018-19410 nvd.nist.gov
Government
Other references from the CVE record and advisory
- ptsecurity.com ptsecurity.com
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