CVE-2018-16421: Opensc Project Opensc

Medium severity, CVSS 6.6. EPSS: 0.7% chance of exploitation in the next 30 days.

Several buffer overflows when handling responses from a CAC Card in cac_get_serial_nr_from_CUID in libopensc/card-cac.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.

Affected products

• Opensc Project Opensc: up to and including 0.18.0

Published 2018-09-04. Last modified 2026-06-17.