How severe is CVE-2018-6533?

CVE-2018-6533 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-6533 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6533?

CVE-2018-6533 affects Icinga. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6533?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-6533 published?

CVE-2018-6533 was published on 2018-02-27 and last updated on 2026-06-17.

CVE-2018-6533

CVE-2018-6533 is a high-severity vulnerability in Icinga with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Icinga
Published: 2018-02-27
Last modified: 2026-06-17

Description

An issue was discovered in Icinga 2.x through 2.8.1. By editing the init.conf file, Icinga 2 can be run as root. Following this the program can be used to run arbitrary code as root. This was fixed by no longer using init.conf to determine account information for any root-executed code (a larger issue than CVE-2017-16933).

Frequently asked questions

What is CVE-2018-6533?: An issue was discovered in Icinga 2.x through 2.8.1. By editing the init.conf file, Icinga 2 can be run as root. Following this the program can be used to run arbitrary code as root. This was fixed by no longer using init.conf to determine account information for any root-executed code (a larger issue than CVE-2017-16933).
How severe is CVE-2018-6533?: CVE-2018-6533 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-6533 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6533?: CVE-2018-6533 affects Icinga. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6533?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-6533 published?: CVE-2018-6533 was published on 2018-02-27 and last updated on 2026-06-17.

References

https://github.com/Icinga/icinga2/pull/5850

Affected products (1)

cpe:2.3:a:icinga:icinga:*:*:*:*:*:*:*:*

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