CVE-2025-40778

Cache poisoning attacks with unsolicited RRs

State: Published
Severity: 8.6 High
Published: Oct 22, 2025
Updated: Feb 26, 2026
Reserved: Apr 16, 2025

Description

Under certain circumstances, BIND is too lenient when accepting records from answers, allowing an attacker to inject forged data into the cache. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.

Scores

CVSS	Score	Vector	Source
3.1	8.6 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N	isc

Weaknesses

CWE-349 Acceptance of Extraneous Untrusted Data With Trusted Data

Affected Products

Product	Versions
BIND 9ISC	9.11.0 through 9.16.50Affected 9.18.0 through 9.18.39Affected 9.20.0 through 9.20.13Affected 9.21.0 through 9.21.12Affected 9.11.3-S1 through 9.16.50-S1Affected 9.18.11-S1 through 9.18.39-S1Affected 9.20.9-S1 through 9.20.13-S1Affected

References

CVE-2025-40778vendor-advisory
https://gist.github.com/N3mes1s/f76b4a606308937b0806a5256bc1f918exploit
http://www.openwall.com/lists/oss-security/2025/10/22/1

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