ISC BIND security advisory (AV26-049)

Serial number: AV26-049
Date: January 22, 2026

On January 21, 2026, ISC published a security advisory to address a vulnerability in the following products:

• ISC BIND 9 – versions 9.18.40 to 9.18.43
• ISC BIND 9 – versions 9.20.13 to 9.20.17
• ISC BIND 9 – versions 9.21.12 to 9.21.16
• BIND Supported Preview Edition – versions 9.18.40-S1 to 9.18.43-S1
• BIND Supported Preview Edition – versions 9.20.13-S1 to 9.20.17-S1

The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.

• CVE-2025-13878: Malformed BRID/HHIT records can cause named to terminate unexpectedly
• BIND 9 Security Vulnerability Matrix