Medium 5.8Published May 19, 2026

CVE-2026-45557Technitium DNS Server excessive DNSSEC requests

Updated under an hour ago (Oct 26, 2026, 8:00 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for Technitium DNS Server

Exploited in the last 30 days

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: 5.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Weakness (CWE): CWE-405, CWE-406, CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: cisa-cg
NVD analysis: Awaiting Analysis
Record last updated: May 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Technitium DNS Server technitium:dns_server (from the name)	before 15.0; 15.0 not affected	CNA record

References

References

https://github.com/TechnitiumSoftware/DnsServer/blo/master/CHANGELOG.md#version-150	patch
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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.