CVE-2026-25834

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-25834
Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.

6.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://mbed-tls.readthedocs.io/en/latest/security-advisories/ Vendor Advisory
https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-sigalg-injection/ Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
cpe:2.3:a:arm:mbed_tls:4.0.0:*:*:*:*:*:*:*
History

06 Apr 2026, 14:17

Type Values Removed Values Added
CPE cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
cpe:2.3:a:arm:mbed_tls:4.0.0:*:*:*:*:*:*:*
First Time Arm
Arm mbed Tls
References () https://mbed-tls.readthedocs.io/en/latest/security-advisories/ - () https://mbed-tls.readthedocs.io/en/latest/security-advisories/ - Vendor Advisory
References () https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-sigalg-injection/ - () https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-sigalg-injection/ - Vendor Advisory

01 Apr 2026, 20:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.5
CWE CWE-327
CWE-295

01 Apr 2026, 18:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-01 18:16

Updated : 2026-04-06 14:17

NVD link : CVE-2026-25834

Mitre link : CVE-2026-25834

CVE.ORG link : CVE-2026-25834

JSON object : View

Products Affected

arm

  • mbed_tls
CWE
CWE-295

Improper Certificate Validation

CWE-327

Use of a Broken or Risky Cryptographic Algorithm