8.6

CVE-2026-13321

DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerISC
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Produkt BIND 9
Default Statusunaffected
Version <= 9.18.50
Version 9.11.0
Status affected
Version <= 9.20.24
Version 9.20.0
Status affected
Version <= 9.21.23
Version 9.21.0
Status affected
Version <= 9.18.50-S1
Version 9.11.3-S1
Status affected
Version <= 9.20.24-S1
Version 9.20.9-S1
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.22% 0.123
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
ISC 8.6 3.9 4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
CWE-346 Origin Validation Error

The product does not properly verify that the source of data or communication is valid.

https://downloads.isc.org/isc/bind9/9.20.26
https://downloads.isc.org/isc/bind9/9.21.24
https://kb.isc.org/docs/cve-2026-13321