CVE-2026-34874

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-34874
An issue was discovered in Mbed TLS through 3.6.5 and 4.x through 4.0.0. There is a NULL pointer dereference in distinguished name parsing that allows an attacker to write to address 0.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

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-null-pointer-dereference-x509/ 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

03 Apr 2026, 20:06

Type Values Removed Values Added
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-null-pointer-dereference-x509/ - () https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-null-pointer-dereference-x509/ - Vendor Advisory
CPE cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
cpe:2.3:a:arm:mbed_tls:4.0.0:*:*:*:*:*:*:*
First Time Arm
Arm mbed Tls

01 Apr 2026, 20:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5
CWE CWE-476

01 Apr 2026, 19:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-01 19:16

Updated : 2026-04-03 20:06

NVD link : CVE-2026-34874

Mitre link : CVE-2026-34874

CVE.ORG link : CVE-2026-34874

JSON object : View

Products Affected

arm

  • mbed_tls
CWE
CWE-476

NULL Pointer Dereference