Vulnerability · Published Apr 26, 2026 · Assigned by mitre
CVE-2026-42255
High 7.2
In plain English
A high-severity security flaw in DnsServer from Technitium. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).
Severity (CVSS 3.1)7.2High
Exploit odds (30 days)0.2%top 89.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Technitium | DnsServer | 0 – before 15.0.0 |
Weakness: CWE-684 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L