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CVE-2026-45557

Technitium DNS Server excessive DNSSEC requests

CVSS 6.9 MEDIUMEPSS 0.4%CWE-405CWE-406CWE-770
Technitium DNS Server aggressively tries to fetch missing RRSIG records or mismatched DNSKEY records. An attacker in control of a domain can cause a vulnerable system to generate excessive network traffic. Fixed in 15.0.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L
Affected products
Technitium · DNS Server

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References
https://github.com/TechnitiumSoftware/DnsServer/blo/master/CHANGELOG.md#version-150https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-138-02.jsonhttps://www.cve.org/CVERecord?id=CVE-2026-45557