What is CVE-2018-6534?

CVE-2018-6534 is a medium-severity vulnerability in Icinga, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2018-02-27.

How severe is CVE-2018-6534?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in Icinga

CVE-2018-6534

An issue was discovered in Icinga 2.x through 2.8.1. By sending specially crafted messages, an attacker can cause a NULL pointer dereference, which can cause the product to crash.

Published 2018-02-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Icinga

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

github.com/Icinga/icinga2/pull/6104 (Third Party Advisory)

Frequently asked questions

What is CVE-2018-6534?: CVE-2018-6534 is a medium-severity vulnerability in Icinga, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2018-02-27.
How severe is CVE-2018-6534?: Medium severity. CVSS v3 base score is 6.5 out of 10.