CVE-2026-87866: wolfSSL public-key pinning bypass

Overview

Severity

Medium (CVSS 6.1)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Oct

Released

2026-10-23

EPSS Score

0.18% (percentile: 7.3%)

Affected Products (4)

Other

• 21862-17084
• 21840-17084
• 21918-17084
• 21021-17084

Revision History

• 2026-10-23: Information published.