CVE-2020-9961

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-10-27 · updated 2026-06-17
Weakness: CWE-125

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.7, Security Update 2020-005 High Sierra, Security Update 2020-005 Mojave. Processing a maliciously crafted image may lead to arbitrary code execution.

Affected products

Apple iCloud for Windows: before 11.5 — fixed in 11.5
Apple iPadOS: before 14.0 — fixed in 14.0
Apple Iphone Os: before 14.0 — fixed in 14.0
Apple iTunes for Windows: before 12.10.9 — fixed in 12.10.9
macOS: from 10.13 before 10.13.6; from 10.14 before 10.14.6; from 10.15 before 10.15.7; 10.13.6, 10.13.6-security_update_2018-002, 10.13.6-security_update_2018-003, 10.13.6-security_update_2019-001, 10.13.6-security_update_2019-002, 10.13.6-security_update_2019-003 (+19) — fixed in 10.13.6, 10.14.6, 10.15.7
Apple tvOS: before 14.0 — fixed in 14.0
Apple watchOS: before 7.0 — fixed in 7.0

How to fix

Upgrade to a fixed version: Apple iCloud for Windows 11.5; Apple iPadOS 14.0; Apple Iphone Os 14.0; Apple iTunes for Windows 12.10.9; macOS 10.13.6, 10.14.6, 10.15.7; Apple tvOS 14.0; Apple watchOS 7.0. Check the vendor advisory for mitigations.

References

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