CVE-2021-35060: Openwaygroup WAY4

Medium severity, CVSS 5.3. EPSS: 0.8% chance of exploitation in the next 30 days.

/way4acs/enroll in OpenWay WAY4 ACS before 1.2.278-2693 allows unauthenticated attackers to leverage response differences to discover whether a specific payment card number is stored in the system.

Affected products

• Openwaygroup WAY4: before 1.2.278-2693 (fixed in 1.2.278-2693)

Published 2021-10-11. Last modified 2026-06-17.