How severe is CVE-2022-33990?

CVE-2022-33990 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 high, and availability none.

Is CVE-2022-33990 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-33990?

CVE-2022-33990 affects Dproxy-nexgen Project Dproxy-nexgen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-33990?

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-2022-33990 published?

CVE-2022-33990 was published on 2022-08-15 and last updated on 2026-06-17.

CVE-2022-33990

CVE-2022-33990 is a high-severity vulnerability in Dproxy-nexgen Project Dproxy-nexgen 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.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Dproxy-nexgen Project Dproxy-nexgen
Published: 2022-08-15
Last modified: 2026-06-17

Description

Misinterpretation of special domain name characters in dproxy-nexgen (aka dproxy nexgen) leads to cache poisoning because domain names and their associated IP addresses are cached in their misinterpreted form.

Frequently asked questions

What is CVE-2022-33990?: Misinterpretation of special domain name characters in dproxy-nexgen (aka dproxy nexgen) leads to cache poisoning because domain names and their associated IP addresses are cached in their misinterpreted form.
How severe is CVE-2022-33990?: CVE-2022-33990 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 high, and availability none.
Is CVE-2022-33990 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-33990?: CVE-2022-33990 affects Dproxy-nexgen Project Dproxy-nexgen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-33990?: 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-2022-33990 published?: CVE-2022-33990 was published on 2022-08-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dproxy-nexgen_project:dproxy-nexgen:-:*:*:*:*:*:*:*

More vulnerabilities in Dproxy-nexgen Project Dproxy-nexgen

CVE-2022-33988 — High (CVSS 7.5): dproxy-nexgen (aka dproxy nexgen) re-uses the DNS transaction id (TXID) value from client queries, which allows…
CVE-2022-33991 — Medium (CVSS 5.3): dproxy-nexgen (aka dproxy nexgen) forwards and caches DNS queries with the CD (aka checking disabled) bit set to 1.…
CVE-2022-33989 — Medium (CVSS 5.3): dproxy-nexgen (aka dproxy nexgen) uses a static UDP source port (selected randomly only at boot time) in upstream…

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