CVE-2026-77860: 'serve-expired' can bypass Unbound 'wait-limit'

Overview

Severity

Low (CVSS 3.7)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-17

Last Updated

2026-09-19

EPSS Score

0.27% (percentile: 19.8%)

Affected Products (1)

Other

• 21878-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-17: Information published.
• 2026-09-18: Information published.
• 2026-09-19: Information published.