CVE-2026-94300 BIND 9 - Remote Code Execution

BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1 contain a remote code execution caused by replaying GSS-TSIG signed UDP messages leading to memory corruption in named, letting attackers execute code remotely, exploit requires valid negotiated TSIG key and crafted queries.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-362

Vendor fix

Update to a version later than 9.21.26 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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