CVE-2026-45557

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 v3 5.8 MEDIUM

5.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope CHANGED

References

Link	Resource
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

Configurations

No configuration.

History

No history.

Information

Published : 2026-05-19 15:16

Updated : 2026-07-24 12:10

NVD link : CVE-2026-45557

Mitre link : CVE-2026-45557

CVE.ORG link : CVE-2026-45557

JSON object : View

Products Affected

No product.

CWE

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

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