When an incoming DNS protocol message includes a Transaction Signature (TSIG), BIND always checks it. If the TSIG contains an invalid value in the algorithm field, BIND immediately aborts with an assertion failure.
This issue affects BIND 9 versions 9.20.0 through 9.20.8 and 9.21.0 through 9.21.7.

Published: 2025-05-21

CVSS: 7.5

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Download Exploit for CVE-2025-40775 here:

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Check our team here:

https://tatramed.sk/exploit-723-cve-2025-21333/

https://tatramed.sk/exploit-50-cve-2020-15174/

https://tatramed.sk/exploit-907-cve-2017-5754/

https://tatramed.sk/exploit-562-cve-2025-9478/