CVE-2025-40776 – BIND Named Cache-Poisoning Vulnerability

The following table lists the changes that have been made to the
CVE-2025-40776 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Jul. 16, 2025

    Action Type Old Value New Value
    Added Description A `named` caching resolver that is configured to send ECS (EDNS Client Subnet) options may be vulnerable to a cache-poisoning attack.
    This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
    Added CWE CWE-349
    Added Reference https://kb.isc.org/docs/cve-2025-40776
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