Vulnerability in Apple Icloud

CVE-2020-9991

This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, iOS 14.0 and iPadOS 14.0, iCloud for Windows 7.21, tvOS 14.0. A remote attacker may be able to cause a denial of service.

EPSS: 0.028 (84.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-9991?
CVE-2020-9991 is a high-severity vulnerability in Apple Icloud. CVSS score: 7.5/10. Published 2020-12-08.
How severe is CVE-2020-9991?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-9991 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.