CVE-2026-13321
8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ISC | BIND 9 | 9.11.0 <= 9.18.50 | affected |
| ISC | BIND 9 | 9.20.0 <= 9.20.24 | affected |
| ISC | BIND 9 | 9.21.0 <= 9.21.23 | affected |
| ISC | BIND 9 | 9.11.3-S1 <= 9.18.50-S1 | affected |
| ISC | BIND 9 | 9.20.9-S1 <= 9.20.24-S1 | affected |
Weaknesses
- CWE-346: CWE-346 Origin Validation Error
Workarounds
No workarounds known.
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://kb.isc.org/docs/cve-2026-13321
- https://downloads.isc.org/isc/bind9/9.20.26
- https://downloads.isc.org/isc/bind9/9.21.24
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