CVE-2026-25834 — MEDIUM (6.5)

CVE-2026-25834 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.

CVE-2026-25834 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Check the references section above for vendor advisories and patch information. Affected products include: Arm Mbed Tls.

Vulnerability Description

Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.

6.5

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

LOW

Vendor	Product	Versions
Arm	Mbed Tls	>= 3.3.0, < 3.6.6

What is CVE-2026-25834?

CVE-2026-25834 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.

How severe is CVE-2026-25834?

CVE-2026-25834 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-25834?

Check the references section above for vendor advisories and patch information. Affected products include: Arm Mbed Tls.