CVE-2026-73064: In Mbed TLS 3.2.0 though 3.6.6 and 4.0.0 through 4.1.0, an attacker who can cause an entropy source to fail can remove or inject bytes into the start of the TLS stream. This only affects TLS 1.3 servers.

Overview

Severity
Low (CVSS 2.9)
CVSS Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Exploit Status
Not Exploited
Patch Tuesday
2026-Sep
Released
2026-10-03
EPSS Score
0.10% (percentile: 0.9%)

Affected Products (1)

Other

  • 21780-17084

Revision History

  • 2026-10-03: Information published.