CVE-2026-45557mediumCWE-405CWE-406CWE-770

CVE-2026-45557: medium-severity vulnerability in Technitium DNS Server

Technitium DNS Server excessive DNSSEC requests

Published

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.9epss 0.5%
exploitation probability
0.5%top 59% of all CVEs
observed exploitation
nono source reports it
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
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