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CVE-2026-34874

HIGH CVSS 3.1: 7.5 EPSS 0.06%
Updated Apr 01, 2026
N/A
Parameter Value
CVSS 7.5 (HIGH)
Type CWE-476 (NULL Pointer Dereference)
Vendor N/A
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

CWE-476 NULL Pointer Dereference

Vulnerable Products

n/a:n/a

References 2

https://mbed-tls.readthedocs.io/en/latest/security-advisories/
NVD
https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-…
NVD
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Related Vulnerabilities

CVE-2026-5455

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CVE-2026-28373

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None

CVE-2026-34871

N/A

6.7

CVE-2026-25835

Mbed

7.7

CVE-2026-25833

Mbed

7.5