What’s Vulnerable › Vulnerabilities

CVE-2022-48256

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-01-13 · updated 2026-06-17
• Weakness: CWE-835

Description

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.

Affected products

• Technitium DNS Server: before 10.0 — fixed in 10.0

How to fix

Upgrade to a fixed version: Technitium DNS Server 10.0. Check the vendor advisory for mitigations.

References

• https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-100
• https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-100

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