CVE-2020-24721 json
An issue was discovered in the GAEN (aka Google/Apple Exposure Notifications) protocol through 2020-09-29, as used in COVID-19 applications…
published 2020-09-30 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-17432
- cvss
- 5.7
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.7 | CVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N |
| NVD | 2.0 | 3.3 | AV:L/AC:M/Au:N/C:P/I:P/A:N |
References
-
blog.google
/inside-google/company-announcements/update-exposure-notifications
vendor-advisory
-
github.com
/minvws/nl-covid19-notification-app-coordination/blob/master/CVEs/CVE-2020-24721.txt
third-party-advisory
-
seclists.org
/fulldisclosure/2020/Sep/53
mailing-list, third-party-advisory
-
packetstormsecurity.com
/files/159419/Corona-Exposure-Notifications-API-Data-Leakage.html
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2020-24721
- NVD CVE-2020-24721
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