How severe is CVE-2018-10920?

CVE-2018-10920 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-10920 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-10920?

CVE-2018-10920 affects Nic Knot Resolver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-10920?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-10920 published?

CVE-2018-10920 was published on 2018-08-02 and last updated on 2026-06-17.

CVE-2018-10920

CVE-2018-10920 is a medium-severity vulnerability in Nic Knot Resolver with a CVSS 3.x base score of 6.8. 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: Medium (CVSS 3.x base score 6.8)
CVSS v2: 4.3
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Nic Knot Resolver
Published: 2018-08-02
Last modified: 2026-06-17

Description

Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison cache.

Frequently asked questions

What is CVE-2018-10920?: Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison cache.
How severe is CVE-2018-10920?: CVE-2018-10920 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-10920 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-10920?: CVE-2018-10920 affects Nic Knot Resolver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-10920?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-10920 published?: CVE-2018-10920 was published on 2018-08-02 and last updated on 2026-06-17.

References

Affected products (1)

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

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