CVE-2020-9818
Last modified
CVE-2020-9818 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 13.5 and iPadOS 13.5, iOS 12.4.7, watchOS 6.2.5. CISA has confirmed active exploitation in the wild. EPSS estimates a 2.29% chance of exploitation in the next 30 days.
Description
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 13.5 and iPadOS 13.5, iOS 12.4.7, watchOS 6.2.5. Processing a maliciously crafted mail message may lead to unexpected memory modification or application termination.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 |
| Apple | Iphone Os | < 12.4.7 |
| Apple | Iphone Os | >= 13.0, < 13.5 |
| Apple | Watchos | < 6.2.5 |
References
- https://support.apple.com/HT211168Release Notes, Vendor Advisory
- https://support.apple.com/HT211169Release Notes, Vendor Advisory
- https://support.apple.com/HT211175Release Notes, Vendor Advisory
- https://support.apple.com/HT211168Release Notes, Vendor Advisory
- https://support.apple.com/HT211169Release Notes, Vendor Advisory
- https://support.apple.com/HT211175Release Notes, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9818US 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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