How severe is CVE-2018-19410?

CVE-2018-19410 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-19410 being actively exploited?

Yes. CVE-2018-19410 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-02-04, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2018-19410?

CVE-2018-19410 affects Paessler Prtg Network Monitor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-19410?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2018-19410 have an EU (EUVD) identifier?

Yes. CVE-2018-19410 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-11103. It is also flagged as exploited in the EUVD (since 2025-02-04).

When was CVE-2018-19410 published?

CVE-2018-19410 was published on 2018-11-21 and last updated on 2026-06-17.

CVE-2018-19410

CVE-2018-19410 is a critical-severity vulnerability in Paessler Prtg Network Monitor with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-02-04).

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 86% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-02-04)
EU (EUVD) id: EUVD-2018-11103
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-02-04)
Affected product: Paessler Prtg Network Monitor
Published: 2018-11-21
Last modified: 2026-06-17

Description

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).

Frequently asked questions

What is CVE-2018-19410?: 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).
How severe is CVE-2018-19410?: CVE-2018-19410 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-19410 being actively exploited?: Yes. CVE-2018-19410 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-02-04, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2018-19410?: CVE-2018-19410 affects Paessler Prtg Network Monitor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-19410?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2018-19410 have an EU (EUVD) identifier?: Yes. CVE-2018-19410 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-11103. It is also flagged as exploited in the EUVD (since 2025-02-04).
When was CVE-2018-19410 published?: CVE-2018-19410 was published on 2018-11-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:paessler:prtg_network_monitor:*:*:*:*:*:*:*:*

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