CVE-2026-55953: TLS 1.2 and DTLS client accepts unoffered anonymous cipher suite, bypassing server authentication

Overview

Severity

High (CVSS 7.7)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-08-07

EPSS Score

0.23% (percentile: 14.5%)

Affected Products (1)

Other

• 21649-17084

Revision History

• 2026-08-07: Information published.