Servers and applications

CVE-2019-9166

Privilege escalation in Nagios XI before 5.5.11 allows local attackers to elevate privileges to root via write access to config.inc.php and import_xiconfig.php.

Severity: High 7.8
Published: 28 Mar 2019
Last changed: 17 Jun 2026
Added to UpHeron: 1 Nov 2026
Fixed in: 5.5.11
Exploit chance: 1.2% in the next 30 daysHigher than 69% of CVEs. EPSS by FIRST, 10 Nov 2026
Weakness: Incorrect permissions on a critical resource (CWE-732)
Attack: Needs local access · Needs a user account · No user action needed
Attacker can: Read data · Change data · Take it down
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Sources: NVD

Affected software

Software	Affected versions
Nagios XIServers and applications · `cpe:a:nagios:nagios_xi`	Every version before 5.5.11

References

NVD https://nvd.nist.gov/vuln/detail/CVE-2019-9166
CVE.org https://www.cve.org/CVERecord?id=CVE-2019-9166