critical Known exploitedREV. 01

CVE-2018-19410Paessler PRTG — unauthenticated request creates administrators

The network monitoring server (PRTG Network Monitor) before 18.2.40.1683 lets an unauthenticated request override an include directive, which an attacker uses to create accounts — administrators included.

YOUR NEXT MOVE

Upgrade past 18.2.40.1683 now; exploitation probability is near certain, so audit the account list for administrators nobody created.

Read the risk

THE VITAL STATS
CVSS score
9.8/ 10
CVSS v3.1
EPSS probability
98%
Likelihood of exploitation
Attack complexity
Low
Conditions needed to exploit
Known exploited
Yes — CISA KEV
CVE published
2018-11-21
Added to KEV
2025-02-04
Exploit published
Not recorded
Confidence
medium
Kill chain
initial access
MITRE ATT&CK
—
Severity
critical

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

Attacker needsNetwork access to the monitoring server; no credentials needed.

Behind the card

3 REFERENCES
Field-level provenanceTRACE THE SOURCES +

Which source supports each field, when it was retrieved, and who extracted it.

FieldsSourceRetrievedExtractorConfidence
cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_atnvd.nist.gov2026-09-24scrty-crds-pipeline/0.1high
exploitation.known_exploited, exploitation.kev_addedcisa.gov2026-09-24scrty-crds-pipeline/0.1high
epssapi.first.org2026-09-24scrty-crds-pipeline/0.1high
title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisitesnvd.nist.gov2026-09-24claude-codehigh

Printing history

THE RECORD
  1. r1Initial base card

First printing. This card has not been reprinted since publication.

crds:cve-2018-19410 · CRDS 0.1 · Issued 2026-09-24