CVE-2026-13321

The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer's zone. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

  • Published Jul 22, 2026
  • CVSS 8.6 high
  • 0.2% chance of exploitation in the next 30 days (EPSS)

Affected software

In the news

CVE-2026-13321 at the National Vulnerability Database