What’s Vulnerable › Vulnerabilities

CVE-2021-40343

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-10-26 · updated 2026-06-17
• Weakness: CWE-732

Description

An issue was discovered in Nagios XI 5.8.5. Insecure file permissions on the nagios_unbundler.py file allow the nagios user to elevate their privileges to the root user.

Affected products

• Nagios XI: 5.8.5

References

• https://assets.nagios.com/downloads/nagiosxi/CHANGES-5.TXT
• 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://synacktiv.com
• https://www.synacktiv.com/sites/default/files/2021-10/Nagios_XI_multiple_vulnerabilities_0.pdf

Get alerted when CVE-2021-40343 or the next vulnerability affects your stack