CVE-2026-42255
Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server...
CVE-2026-42255 is a high vulnerability (CVSS 7.2) in Technitium Dnsserver, published April 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 10th percentile. No source names a fixed version.
Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.
- Record
CVE-2026-42255- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L - Weakness
- CWE-684
- Updated
- 2026-11-02
EUVDEUVD-2026-25688
Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.
- Record
EUVD-2026-25688- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-v7f3-6mf2-m8hj
Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server...
Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.
- Record
GHSA-v7f3-6mf2-m8hj- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L - Weakness
- CWE-684
- Updated
- 2026-11-02
NVD
Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.
- Record
CVE-2026-42255- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L - Weakness
- CWE-684
- Updated
- 2026-11-02
OSV
Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.
- Record
CVE-2026-42255- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L - Weakness
- CWE-684
- Updated
- 2026-11-02
Affected products
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-02 | created | CVE List, EUVD, GitHub Advisories, NVD, OSV |