CVE-2021-36366

Name: CVE-2021-36366
Creator: NVD / NIST
Published: 2021-09-28T17:15:07.627+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.88%

Last modified Jun 17, 2026

CVE-2021-36366 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Nagios XI before 5.8.5 incorrectly allows manage_services.sh wildcards.. EPSS estimates a 3.88% chance of exploitation in the next 30 days.

Description

Nagios XI before 5.8.5 incorrectly allows manage_services.sh wildcards.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

3.88%

88.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Nagios	Nagios Xi	< 5.8.5

References

https://assets.nagios.com/downloads/nagiosxi/CHANGES-5.TXTRelease Notes, Vendor Advisory
https://www.nagios.com/downloads/nagios-xi/change-log/Release Notes, Vendor Advisory
https://assets.nagios.com/downloads/nagiosxi/CHANGES-5.TXTRelease Notes, Vendor Advisory
https://www.nagios.com/downloads/nagios-xi/change-log/Release Notes, Vendor Advisory

Timeline

Published: Sep 28, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-36366?

Nagios XI before 5.8.5 incorrectly allows manage_services.sh wildcards.

How severe is CVE-2021-36366?

CVE-2021-36366 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.88% probability of exploitation in the next 30 days.

How do I fix CVE-2021-36366?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-36366?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST