Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-13321

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
22/07/2026
Last modified:
22/07/2026

Description

The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer&amp;#39;s zone.<br /> This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 8.60 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): None
Integrity (I): High
Availability (A): None

Base Score 3.x
8.60
Severity 3.x
HIGH

References to Advisories, Solutions, and Tools