How severe is CVE-2018-1110?

CVE-2018-1110 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-2018-1110 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1110?

CVE-2018-1110 affects Nic Knot Resolver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1110?

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-2018-1110 published?

CVE-2018-1110 was published on 2021-03-30 and last updated on 2026-06-17.

CVE-2018-1110

CVE-2018-1110 is a high-severity vulnerability in Nic Knot Resolver 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Nic Knot Resolver
Published: 2021-03-30
Last modified: 2026-06-17

Description

A flaw was found in knot-resolver before version 2.3.0. Malformed DNS messages may cause denial of service.

Frequently asked questions

What is CVE-2018-1110?: A flaw was found in knot-resolver before version 2.3.0. Malformed DNS messages may cause denial of service.
How severe is CVE-2018-1110?: CVE-2018-1110 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-2018-1110 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1110?: CVE-2018-1110 affects Nic Knot Resolver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1110?: 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-2018-1110 published?: CVE-2018-1110 was published on 2021-03-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*

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