CVE-2020-9818

State: Published
Severity: 8.8 High
Published: Jun 9, 2020
Updated: Dec 20, 2025
Reserved: Mar 2, 2020

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
iOSApple	before iOS 13.5 and iPadOS 13.5Affected
iOS-1Apple	before iOS 12.4.7Affected
watchOSApple	before watchOS 6.2.5Affected

References

https://support.apple.com/HT211168
https://support.apple.com/HT211175
https://support.apple.com/HT211169
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9818government-resource

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