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TI-2021-19156 Aliases CVE-2021-43105GHSA-fh5j-qj82-2m8v

A vulnerability in the bailiwick checking function in Technitium DNS Server <= v7.0…

Priority LOW 21Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

A vulnerability in the bailiwick checking function in Technitium DNS Server <= v7.0 exists that allows specific malicious users to inject `NS` records of any domain (even TLDs) into the cache and conduct a DNS cache poisoning attack.

Why it matters now

EPSS 0.00541 45th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:technitium:dns_server:*:*:*:*:*:*:*:*up to 7.0VulnerableTechnitium
  • cpe:2.3:a:technitium:dns_server:*:*:*:*:*:*:*:* Versions up to 7.0 Vulnerable ·Technitium

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43105
  2. 2026-10-03 Alias added: GHSA-fh5j-qj82-2m8v

References

Advisory 1

  • 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-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

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences