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CVE-2021-40345

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 22.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-10-26 · updated 2026-06-17
• Weakness: CWE-77

Description

An issue was discovered in Nagios XI 5.8.5. In the Manage Dashlets section of the Admin panel, an administrator can upload ZIP files. A command injection (within the name of the first file in the archive) allows an attacker to execute system commands.

Affected products

• Nagios XI: 5.8.5

References

• https://assets.nagios.com/downloads/nagiosxi/CHANGES-5.TXT
• https://github.com/ArianeBlow/NagiosXI-EmersonFI/blob/main/README.md
• https://synacktiv.com
• https://www.synacktiv.com/sites/default/files/2021-10/Nagios_XI_multiple_vulnerabilities_0.pdf
• https://assets.nagios.com/downloads/nagiosxi/CHANGES-5.TXT
• https://github.com/ArianeBlow/NagiosXI-EmersonFI/blob/main/README.md
• https://synacktiv.com
• https://www.synacktiv.com/sites/default/files/2021-10/Nagios_XI_multiple_vulnerabilities_0.pdf

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