How severe is CVE-2019-6473?

CVE-2019-6473 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-6473 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-6473?

CVE-2019-6473 primarily affects Ics Kea. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-6473?

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

When was CVE-2019-6473 published?

CVE-2019-6473 was published on 2019-10-16 and last updated on 2026-06-17.

CVE-2019-6473

CVE-2019-6473 is a medium-severity vulnerability in Ics Kea with a CVSS 3.x base score of 6.5. 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-617.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 3.3
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-617
Affected product: Ics Kea
Published: 2019-10-16
Last modified: 2026-06-17

Description

An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.

Frequently asked questions

What is CVE-2019-6473?: An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.
How severe is CVE-2019-6473?: CVE-2019-6473 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-6473 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-6473?: CVE-2019-6473 primarily affects Ics Kea. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-6473?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-6473 published?: CVE-2019-6473 was published on 2019-10-16 and last updated on 2026-06-17.

References

https://kb.isc.org/docs/cve-2019-6473

Affected products (3)

cpe:2.3:a:ics:kea:*:*:*:*:*:*:*:*
cpe:2.3:a:ics:kea:1.6.0:beta1:*:*:*:*:*:*
cpe:2.3:a:ics:kea:1.6.0:beta2:*:*:*:*:*:*

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