Technitium DNS Server excessive DNSSEC requests
Priority LOW 31CWE-405Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00389 33rd percentileScored 2026-11-07
Fix Fixed DNS Server (Technitium): 15.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Technitium | DNS Server | before 15.0 | 15.0 | Patch available | CNA |
- DNS Server VendorTechnitium Affected before 15.0 Fixed in 15.0 Patch available CNA
Remediation
- Fix · CNA DNS Server (Technitium) Fixed in 15.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-45557
- 2026-10-03 Alias added: GHSA-vpfg-gc96-vg45
More Technitium vulnerabilities
- TI-2022-12504 An issue was discovered in Technitium DNS Server through 8.0.2 that allows variant V2 of… CVSS 3.1CRITICAL 9.8
- TI-2022-12503 An issue was discovered in Technitium DNS Server through 8.0.2 that allows variant V1 of… CVSS 3.1CRITICAL 9.8
- TI-2025-32106 An issue in Technitium DNS Server v.13.5 allows a remote attacker to cause a denial of… CVSS 3.1HIGH 7.5
- TI-2023-26858 Technitium 11.5.3 allows remote attackers to cause a denial of service (bandwidth… CVSS 3.1HIGH 7.5
- TI-2023-12997 An issue was discovered in Technitium through 11.0.2. CVSS 3.1HIGH 7.5
- TI-2022-23891 Technitium DNS Server before 10.0 allows a self-CNAME denial-of-service attack in which a… CVSS 3.1HIGH 7.5
Sources
- CVE-2026-45557 · CVE Program
- CVE-2026-45557 · NVD
- FIRST EPSS
- GHSA-vpfg-gc96-vg45 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences