CVE-2007-2926: ISC BIND

Medium severity, CVSS 4.3. EPSS: 13.1% chance of exploitation in the next 30 days.

ISC BIND 9 through 9.5.0a5 uses a weak random number generator during generation of DNS query ids when answering resolver questions or sending NOTIFY messages to slave name servers, which makes it easier for remote attackers to guess the next query id and perform DNS cache poisoning.

Affected products

• ISC BIND: version 9.0 only; version 9.1 only; version 9.2 only; version 9.3 only; version 9.4 only; version 9.5 only; …

Published 2007-07-24. Last modified 2026-06-16.