What is CVE-2026-45557?

CVE-2026-45557 is a medium-severity vulnerability in Technitium Dns Server, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 5.8/10. Published 2026-05-19.

How severe is CVE-2026-45557?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Resource exhaustion in Technitium Dns Server

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.

EPSS: 0.000 (15.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L.

Affected products

Technitium Dns Server — versions 0, 15.0

Weakness classification (CWE)

CWE-405 — Asymmetric Resource Consumption (Amplification)
CWE-406
CWE-770 — Allocation of Resources Without Limits or Throttling

References

9119a7d8-5eab-497f-8521-727c672e3725 (patch)
9119a7d8-5eab-497f-8521-727c672e3725
9119a7d8-5eab-497f-8521-727c672e3725

Frequently asked questions

What is CVE-2026-45557?: CVE-2026-45557 is a medium-severity vulnerability in Technitium Dns Server, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 5.8/10. Published 2026-05-19.
How severe is CVE-2026-45557?: Medium severity. CVSS v3 base score is 5.8 out of 10.