VDB
CVE-2026-19666
CVE-2026-19666
PUBLISHED
CVSS 7.5 HIGH
Reported by isc · Published September 16, 2026
On a resolver configured to use ``dns64``, if an applicable answer from the authoritative server is malformed in a specific way, the resolver `named` process will exit unexpectedly. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| ISC | BIND 9 | 9.11.0, 9.20.0, 9.21.0 |
| isc | bind | 9.11.0, 9.20.0, 9.21.0 |
| ISC | BIND 9 | 9.11.0, 9.20.0, 9.21.0 |
Timeline
- Sep 16, 2026 Coalition ESS Score
- Sep 16, 2026 CVE Published
References
- CVE-2026-19666 vendor-advisory
- patch
- patch