CVE-2021-37155: wolfSSL

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

wolfSSL 4.6.x through 4.7.x before 4.8.0 does not produce a failure outcome when the serial number in an OCSP request differs from the serial number in the OCSP response.

Affected products

• wolfSSL wolfSSL: from 4.6.0, before 4.8.0 (fixed in 4.8.0)

Published 2021-07-21. Last modified 2026-06-17.