Actively exploited in the wild
Apple iOS, iPadOS, and watchOS Out-of-Bounds Write Vulnerability
Apple - iOS, iPadOS, and watchOS · Listed in the CISA KEV since 2021-11-03. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2020-9818
HighCVSS 8.8KEVSummary
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.
Risk Assessment
An attacker could send a malicious email that, when processed by an Apple device, may cause application crash or potentially allow code execution in the context of the mail application.
Recommendation
Update iOS, iPadOS, and watchOS to the latest versions that include the fix for this vulnerability.
Other vulnerabilities in Apple iOS
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- CVE-2026-43814Critical
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- CVE-2022-42827HighActively exploited
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- CVE-2020-9859HighActively exploited
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- CVE-2020-3837HighActively exploited
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- CVE-2019-8605HighActively exploited
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 12.3, macOS Mojave 10.14.5, tvOS 12.3, watchOS 5.2.1. A malicious application may be able to execute arbitrary code with system privileges.
- CVE-2019-7287HighActively exploited
A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 12.1.4. An application may be able to execute arbitrary code with kernel privileges.
- CVE-2026-65347Medium
An issue addressed with improved checks affects iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS. Processing an image may lead to a denial-of-service.
Original NVD description (English source)
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.