How severe is CVE-2018-6532?

CVE-2018-6532 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-6532 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6532?

CVE-2018-6532 affects Icinga. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6532?

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-2018-6532 published?

CVE-2018-6532 was published on 2018-02-27 and last updated on 2026-06-17.

CVE-2018-6532

CVE-2018-6532 is a high-severity vulnerability in Icinga with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
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 sending specially crafted (authenticated and unauthenticated) requests, an attacker can exhaust a lot of memory on the server side, triggering the OOM killer.

Frequently asked questions

What is CVE-2018-6532?: An issue was discovered in Icinga 2.x through 2.8.1. By sending specially crafted (authenticated and unauthenticated) requests, an attacker can exhaust a lot of memory on the server side, triggering the OOM killer.
How severe is CVE-2018-6532?: CVE-2018-6532 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-6532 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6532?: CVE-2018-6532 affects Icinga. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6532?: 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-2018-6532 published?: CVE-2018-6532 was published on 2018-02-27 and last updated on 2026-06-17.

References

https://github.com/Icinga/icinga2/pull/6103

Affected products (1)

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

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