CVE Watch—

CVE-2020-9818

Apple iOS, iPadOS, and watchOS Out-of-Bounds Write Vulnerability

CVSS

—

No CVSS

EPSS

2.3%

p82

KEV

YES

Nov 3, 2021

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

2.3%EPSS · 30 days2.3%

2026-08-022026-08-31

KEV catalog record

Product

Apple / iOS, iPadOS, and watchOS

Vulnerability

Apple iOS, iPadOS, and watchOS Out-of-Bounds Write Vulnerability

Added to KEV

Nov 3, 2021

Remediate by

May 3, 2022

Known ransomware use

Summary description

Apple iOS, iPadOS, and watchOS Mail contains an out-of-bounds write vulnerability which may allow memory modification or application termination when processing a maliciously crafted mail message.

Required action

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2020-9818

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