CVE-2026-13321

8.6 HIGH
Published: July 22, 2026 Modified: July 22, 2026
View on NVD

Description

The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer's zone. 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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://downloads.isc.org/isc/bind9/9.20.26
Source: security-officer@isc.org
https://downloads.isc.org/isc/bind9/9.21.24
Source: security-officer@isc.org
https://kb.isc.org/docs/cve-2026-13321
Source: security-officer@isc.org

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.6 / 10.0
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)