CVE-2016-6885: Matrixssl

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

The pstm_exptmod function in MatrixSSL before 3.8.4 allows remote attackers to cause a denial of service (invalid free and crash) via a base zero value for the modular exponentiation.

Affected products

• Matrixssl Matrixssl: up to and including 3.8.3

Published 2017-01-13. Last modified 2026-06-17.