CVE-2021-34193: Opensc Project Opensc

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

Stack overflow vulnerability in OpenSC smart card middleware before 0.23 via crafted responses to APDUs.

Affected products

• Opensc Project Opensc: before 0.22.0 (fixed in 0.22.0)

Published 2023-08-22. Last modified 2026-06-17.