CVE-2026-25832

State: Published
Severity: 3.7 Low
Published: Sep 14, 2026
Updated: Sep 14, 2026
Reserved: Feb 6, 2026

Description

In Mbed TLS 3.6.x before 3.6.7 and 4.1.x before 4.1.2, the TLS 1.3 client accepts HelloRetryRequest selecting an unadvertised group.

Scores

CVSS	Score	Vector	Source
3.1	3.7 Low	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N	mitre

Weaknesses

CWE-669 Incorrect Resource Transfer Between Spheres

Affected Products

Product	Versions
Mbed TLSTrustedFirmware	3.5.0 to before 3.6.7Affected 4.0.0 to before 4.1.2Affected

References

https://mbed-tls.readthedocs.io/en/latest/security-advisories/
https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-07-tls13-hrr-unadvertised-group/

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