CVE-2020-9991
7.5 · HIGHOverview
CVE-2020-9991 is a high-severity vulnerability affecting apple icloud. It was published on December 8, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from apple. Update icloud to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| apple | icloud | >= 0, < 7.21 | Affected |
| apple | ipados | >= 0, < 14.0 | Affected |
| apple | iphone_os | >= 0, < 14.0 | Affected |
| apple | mac_os_x | >= 0, < 11.0.1 | Affected |
| apple | tvos | >= 0, < 14.0 | Affected |
| apple | watchos | >= 0, < 7.0 | Affected |
References
Frequently Asked Questions
What is CVE-2020-9991?
CVE-2020-9991 is a high-severity vulnerability affecting apple icloud. It was published on December 8, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2020-9991?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-9991?
Check the references section for vendor advisories and patches from apple. Update icloud to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-9991?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-9991 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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