How severe is CVE-2022-33993?

CVE-2022-33993 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2022-33993 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-33993?

CVE-2022-33993 affects Domain Name Relay Daemon Project Domain Name Relay Daemon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-33993?

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

When was CVE-2022-33993 published?

CVE-2022-33993 was published on 2022-08-15 and last updated on 2026-06-17.

CVE-2022-33993

CVE-2022-33993 is a medium-severity vulnerability in Domain Name Relay Daemon Project Domain Name Relay Daemon with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Domain Name Relay Daemon Project Domain Name Relay Daemon
Published: 2022-08-15
Last modified: 2026-06-17

Description

Misinterpretation of special domain name characters in DNRD (aka Domain Name Relay Daemon) 2.20.3 leads to cache poisoning because domain names and their associated IP addresses are cached in their misinterpreted form.

Frequently asked questions

What is CVE-2022-33993?: Misinterpretation of special domain name characters in DNRD (aka Domain Name Relay Daemon) 2.20.3 leads to cache poisoning because domain names and their associated IP addresses are cached in their misinterpreted form.
How severe is CVE-2022-33993?: CVE-2022-33993 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2022-33993 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-33993?: CVE-2022-33993 affects Domain Name Relay Daemon Project Domain Name Relay Daemon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-33993?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-33993 published?: CVE-2022-33993 was published on 2022-08-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:domain_name_relay_daemon_project:domain_name_relay_daemon:2.20.3:*:*:*:*:*:*:*

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CVE-2022-33992 — High (CVSS 7.5): DNRD (aka Domain Name Relay Daemon) 2.20.3 forwards and caches DNS queries with the CD (aka checking disabled) bit set…

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