CVE-2026-45557

Technitium DNS Server excessive DNSSEC requests

State: Published
Severity: 6.9 Medium
Published: May 19, 2026
Updated: May 19, 2026
Reserved: May 12, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	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	cisa-cg
3.1	5.8 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L	cisa-cg

Weaknesses

CWE-405 Asymmetric Resource Consumption (Amplification)
CWE-406 Insufficient Control of Network Message Volume (Network Amplification)
CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
DNS ServerTechnitium	before 15.0Affected 15.0Not affected

References

urlpatch
url
url

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.