Vulnerability Intelligence Report
Apple iOS, iPadOS, and watchOS Out-of-Bounds Write Vulnerability
CVE-2020-9818
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.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
8.8
HIGH
Exploitability:2.9
Impact Score:5.9
EPSS Probability:2.29%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-787 ↗CWE-787 Out-of-bounds Write
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Apple | iOS | unspecified < iOS 13.5 and iPadOS 13.5 (affected) |
| Apple | iOS-1 | unspecified < iOS 12.4.7 (affected) |
| Apple | watchOS | unspecified < watchOS 6.2.5 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Apple Inc. · Vendor · USA |
| Reserved | 2020-03-02T00:00:00 |
| Published | 2020-06-09T16:12:39 |
| Last Updated | 2025-12-20T04:55:53 |
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