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    CVE-2026-80274

    If a BIND resolver sends a query for a DNSSEC-signed authoritative zone, and the authoritative server replies with a valid wildcard answer and signed NSEC3 proof, followed by an unsigned NSEC at the same owner name, it will trigger an unexpected program exit. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.

    Published:Sep 16, 2026
    Last Modified:Sep 17, 2026
    EPS:Sep 16, 2026
    EPSS Score:0.00486
    CVSS Score:7.5

    Affected Products

    Vendor
    Isc
    Product
    Bind
    Vendor
    Isc
    Product
    Bind 9

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-617 Reachable Assertion

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-96888 (CVSS 7.5) — A BIND resolver that is configured with both a "redirect" zone and "qname-minimization strict" may abort with …
    CVE-2026-94300 (CVSS 8.1) — Replaying GSS-TSIG signed UDP messages can result in memory corruption in "`named`". An attacker who can capt…
    CVE-2026-19630 (CVSS 7.5) — In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional proces…
    CVE-2026-77119 (CVSS 5.9) — A validly signed NSEC3 from an unrelated sibling zone may be accepted as an insecurity proof, downgrading a se…
    CVE-2026-75029 (CVSS 5.3) — In a query response, an attacker may send `named` multiple copies of a record that should only exist once (suc…
    CVE-2026-19668 (CVSS 5.3) — A BIND recursive resolver may experience excessive resource consumption if it encounters large numbers of a pa…
    CVE-2026-19033 (CVSS 6.5) — For a secondary zone with transfers restricted by TSIG, `named` may start to serve the data provided in a zone…
    CVE-2026-76163 (CVSS 7.5) — If BIND is loaded with a "`named.conf`" file that contains no global "`options`" block, an attacker can send a…
    CVE-2026-19666 (CVSS 7.5) — On a resolver configured to use ``dns64``, if an applicable answer from the authoritative server is malformed …

    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