Vulnerability · Published May 19, 2026 · Assigned by cisa-cg
CVE-2026-45557Technitium DNS Server excessive DNSSEC requests
Medium 5.8
In plain English
A medium-severity resource allocation without limits in DNS Server from Technitium. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).
Severity (CVSS 3.1)5.8Medium
Exploit odds (30 days)0.4%top 66.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Technitium | DNS Server | 0 – before 15.0 |
Weakness: CWE-405, CWE-406, CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L