PatchTheCVECVE-2020-24721: An issue was discovered in the GAEN (aka Google/Apple Exposure Notifications) protocol through 2020-09-29, as
CVE-2020-24721 is a medium-severity flaw (CVSS 5.7) affecting exposure notifications, exposure notifications. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.7 (Medium) |
| Attack vector | Physical |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | Required |
| EPSS exploit chance | 0.3% (top 75%) |
| CISA exploited list | No |
| Published | 2020-09-30 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-24721?
exposure notifications: upgrade to newer than 1.5; exposure notifications: upgrade to newer than 1.5. Exact commands for each OS are on this page.
Is CVE-2020-24721 being exploited?
CVE-2020-24721 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-24721 affect?
CVE-2020-24721 affects exposure notifications, exposure notifications. Severity is medium (CVSS 5.7). 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 pro
How urgent is CVE-2020-24721?
Priority 26/100. No elevated risk signals yet.
Software pages
Android vulnerabilities · iOS vulnerabilities
Related CVEs
- CVE-2020-24722 MEDIUM 5.9 UPGRADE UPGRADE An issue was discovered in the GAEN (aka Google/Apple Exposure Notifications) protocol through 2020-10-05, as