CVE-2022-48256

HIGHNVD 7.57.5—

7.5

Technitium DNS Server before 10.0 allows a self-CNAME denial-of-service attack in which a CNAME loop causes an answer to contain hundreds of records.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 61.7%
KEV: Not listed

Published

January 13, 2023

Last Modified

April 7, 2025

References (2)

cve@mitrehttps://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-100
af854a3a-2127-422b-91ae-364da2661108https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-100

Weakness Classification(1)

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

CWE-835Loop with Unreachable Exit Condition (Infinite Loop)

Data Freshness Timeline

(refreshed 11× 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 20:12 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
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2026-05-29 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
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2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 08:40 UTCEG score recompute

Frequently asked(5)

What is CVE-2022-48256?

CVE-2022-48256 is a high vulnerability published on January 13, 2023. Technitium DNS Server before 10.0 allows a self-CNAME denial-of-service attack in which a CNAME loop causes an answer to contain hundreds of records.

When was CVE-2022-48256 disclosed?

CVE-2022-48256 was first published in the National Vulnerability Database on January 13, 2023, with the most recent update on April 7, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2022-48256 actively exploited?

CVE-2022-48256 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 61.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2022-48256?

CVE-2022-48256 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2022-48256?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-48256, 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.

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CVE-2022-48256

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2022-48256?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (2)

Frequently asked(5)

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