CVE-2025-40776HIGH 8.6EPSS p15.4%

CVE-2025-40776CVE-2025-40776

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.

Scoring

CVSS 3.18.6 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
EPSS0.24% probability of exploitation · percentile 15.4% · 2026-06-19T12:03:05Z
Published2025-07-16
Last modified2026-04-15

Underlying weaknesses· 1

CWE-349

References

  1. https://kb.isc.org/docs/cve-2025-40776

1

TypeTargetConfidenceTier
WeaknessAcceptance of Extraneous Untrusted Data With Trusted Datacwe-3490%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.