CVE-2026-6091: Partial-chain verification accepts untrusted intermediate as trust anchor

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Jun

Released

2026-07-01

EPSS Score

0.12% (percentile: 2.2%)

Affected Products (1)

Other

• 21516-17084

Revision History

• 2026-07-01: Information published.