4.3 Medium Exploited

CVE-2020-9819 Apple iOS, iPadOS, and watchOS Memory Corruption Vulnerability

Active exploitation observed

· CISA KEV catalogue

Required action Apply updates per vendor instructions.

Ransomware campaigns Not observed so far

Weakness CWE-787

Description

A memory consumption issue was addressed with improved memory handling. This issue is fixed in iOS 13.5 and iPadOS 13.5, iOS 12.4.7, watchOS 6.2.5, watchOS 5.3.7. Processing a maliciously crafted mail message may lead to heap corruption.

Affected products and versions

Product	Affected versions	Fixed in
iOS	Versions not published
iOS-1	Versions not published
watchOS	Versions not published
watchOS-1	Versions not published

References

support.apple.com support.apple.com
support.apple.com support.apple.com
support.apple.com support.apple.com
support.apple.com support.apple.com

Timeline

Published June 9, 2020
Added to the KEV catalogue November 3, 2021
Last modified December 20, 2025

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