CVE-2025-40776

HIGH EPSS 9.7%

Published Jul 16, 202511mo ago · Modified Jun 17, 20261w ago

8.6 CVSS 3.1

High

Published Jul 16, 2025 11mo ago

Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score

8.6

Exploitability

3.9

Impact

4.0

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Changed

Confidentiality None

Integrity High

Availability None

Threat Intelligence

EPSS Exploit Probability

9.7% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-349

References 1

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.