CVE-2026-45557

Description

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 Vector

References

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