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    CVE-2026-42255

    Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.

    Published:Apr 26, 2026
    Last Modified:Apr 28, 2026
    EPS:Apr 26, 2026
    EPSS Score:0.00033
    CVSS Score:7.2

    Affected Products

    Vendor
    Technitium
    Product
    Dnsserver

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2024-56946 (CVSS 5.3) — Denial of service in DNS-over-QUIC in Technitium DNS Server <= v13.2.2 allows remote attackers to permanently …
    CVE-2023-28455 (CVSS 7.5) — An issue was discovered in Technitium through 11.0.2. The forwarding mode enables attackers to create a query …
    CVE-2023-28456 (CVSS 7.5) — An issue was discovered in Technitium through 11.0.2. It enables attackers to launch amplification attacks (3 …
    CVE-2023-28451 (CVSS 7.5) — An issue was discovered in Technitium 11.0.2. There is a vulnerability (called BadDNS) in DNS resolving softwa…
    CVE-2023-49203 (CVSS 7.5) — Technitium 11.5.3 allows remote attackers to cause a denial of service (bandwidth amplification) because the D…
    CVE-2023-28457 (CVSS 7.5) — An issue was discovered in Technitium through 11.0.3. It enables attackers to conduct a DNS cache poisoning at…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High