CVE-2026-13321: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field

Overview

Severity

High (CVSS 8.6)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-07-25

Last Updated

2026-08-07

EPSS Score

0.22% (percentile: 12.9%)

Affected Products (1)

Other

• 21616-17084

Revision History

• 2026-07-25: Information published.
• 2026-08-07: Information published.