What’s Vulnerable › Vulnerabilities

CVE-2021-36366

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-28 · updated 2026-06-17

Description

Nagios XI before 5.8.5 incorrectly allows manage_services.sh wildcards.

Affected products

• Nagios XI: before 5.8.5 — fixed in 5.8.5

How to fix

Upgrade to a fixed version: Nagios XI 5.8.5. Check the vendor advisory for mitigations.

References

• https://assets.nagios.com/downloads/nagiosxi/CHANGES-5.TXT
• https://www.nagios.com/downloads/nagios-xi/change-log/
• https://assets.nagios.com/downloads/nagiosxi/CHANGES-5.TXT
• https://www.nagios.com/downloads/nagios-xi/change-log/

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