CVE-2020-9859
Last modified
CVE-2020-9859 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A memory consumption issue was addressed with improved memory handling. This issue is fixed in iOS 13.5.1 and iPadOS 13.5.1, macOS Catalina 10.15.5 Supplemental Update, tvOS 13.4.6, watchOS 6.2.6. CISA has confirmed active exploitation in the wild. EPSS estimates a 0.80% chance of exploitation in the next 30 days.
Description
A memory consumption issue was addressed with improved memory handling. This issue is fixed in iOS 13.5.1 and iPadOS 13.5.1, macOS Catalina 10.15.5 Supplemental Update, tvOS 13.4.6, watchOS 6.2.6. An application may be able to execute arbitrary code with kernel privileges.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Ipados | < 13.5.1 |
| Apple | Iphone Os | < 13.5.1 |
| Apple | Mac Os X | < 10.15.5 |
| Apple | Tvos | < 13.4.6 |
| Apple | Watchos | < 6.2.6 |
References
- https://support.apple.com/HT211214Release Notes, Vendor Advisory
- https://support.apple.com/HT211214Release Notes, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9859US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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