CVE-2020-15309: wolfSSL

High severity, CVSS 7.0. EPSS: 0.3% chance of exploitation in the next 30 days.

An issue was discovered in wolfSSL before 4.5.0, when single precision is not employed. Local attackers can conduct a cache-timing attack against public key operations. These attackers may already have obtained sensitive information if the affected system has been used for private key operations (e.g., signing with a private key).

Affected products

• wolfSSL wolfSSL: before 4.5.0 (fixed in 4.5.0)

Published 2020-08-21. Last modified 2026-06-17.