CVE-2020-24721: Apple Exposure Notifications

Medium severity, CVSS 5.7. EPSS: 0.3% chance of exploitation in the next 30 days.

An issue was discovered in the GAEN (aka Google/Apple Exposure Notifications) protocol through 2020-09-29, as used in COVID-19 applications on Android and iOS. It allows a user to be put in a position where he or she can be coerced into proving or disproving an exposure notification, because of the persistent state of a private framework.

Affected products

• Apple Exposure Notifications: up to and including 1.5
• Google Exposure Notifications: up to and including 1.5

Published 2020-09-30. Last modified 2026-06-17.