CVE-2022-33991

MEDIUMNVD 5.35.3—

5.3

dproxy-nexgen (aka dproxy nexgen) forwards and caches DNS queries with the CD (aka checking disabled) bit set to 1. This leads to disabling of DNSSEC protection provided by upstream resolvers.

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 49.4%
KEV: Not listed

Published

August 15, 2022

Last Modified

November 21, 2024

References (6)

cve@mitrehttps://sourceforge.net/projects/dproxy/
cve@mitrehttps://www.openwall.com/lists/oss-security/2022/08/14/3
cve@mitrehttps://www.usenix.org/conference/usenixsecurity22/presentation/jeitner
af854a3a-2127-422b-91ae-364da2661108https://sourceforge.net/projects/dproxy/
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2022/08/14/3
af854a3a-2127-422b-91ae-364da2661108https://www.usenix.org/conference/usenixsecurity22/presentation/jeitner

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-290Authentication Bypass by Spoofing

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
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Frequently asked(5)

What is CVE-2022-33991?

CVE-2022-33991 is a medium vulnerability published on August 15, 2022. dproxy-nexgen (aka dproxy nexgen) forwards and caches DNS queries with the CD (aka checking disabled) bit set to 1. This leads to disabling of DNSSEC protection provided by upstream resolvers.

When was CVE-2022-33991 disclosed?

CVE-2022-33991 was first published in the National Vulnerability Database on August 15, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2022-33991 actively exploited?

CVE-2022-33991 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 49.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2022-33991?

CVE-2022-33991 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2022-33991?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-33991, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2022-33991

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2022-33991?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)