Is CVE-2026-34871 actively exploited?

CVE-2026-34871 has no public evidence of in-the-wild exploitation as of 2026-04-06.

What is the CVSS score for CVE-2026-34871?

CVE-2026-34871 has a CVSS score of 6.7 (MEDIUM severity). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

How do I patch CVE-2026-34871?

Patch guidance is available from arm security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-34871.

Which products are affected by CVE-2026-34871?

2 products: arm mbed tls, arm tf-psa-crypto.

CVE-2026-34871 - remediation guidance & executive summary

Description

An issue was discovered in Mbed TLS before 3.6.6 and 4.x before 4.1.0 and TF-PSA-Crypto before 1.1.0. There is a Predictable Seed in a Pseudo-Random Number Generator (PRNG).

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector: local
Complexity: high
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: none
Weaknesses: CWE-338

Metadata

Primary Vendor: ARM
Published: 4/1/2026
Last Modified: 4/6/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-34871

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary