What’s Vulnerable › Vulnerabilities

CVE-2020-9926

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-02 · updated 2026-06-17
• Weakness: CWE-416

Description

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 13.6 and iPadOS 13.6, tvOS 13.4.8, watchOS 6.2.8, iCloud for Windows 7.20, macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra. Processing maliciously crafted XML may lead to an unexpected application termination or arbitrary code execution.

Affected products

• Apple iCloud for Windows: before 7.20 — fixed in 7.20
• Apple iPadOS: before 13.6 — fixed in 13.6
• Apple Iphone Os: before 13.6 — fixed in 13.6
• macOS: before 10.13.6; from 10.14 before 10.14.6; from 10.15 before 10.15.6; 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, 10.15.6
• Apple tvOS: before 13.4.8 — fixed in 13.4.8
• Apple watchOS: before 6.2.8 — fixed in 6.2.8

How to fix

Upgrade to a fixed version: Apple iCloud for Windows 7.20; Apple iPadOS 13.6; Apple Iphone Os 13.6; macOS 10.13.6, 10.14.6, 10.15.6; Apple tvOS 13.4.8; Apple watchOS 6.2.8. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT211288
• https://support.apple.com/en-us/HT211289
• https://support.apple.com/en-us/HT211290
• https://support.apple.com/en-us/HT211291
• https://support.apple.com/en-us/HT211295
• https://support.apple.com/en-us/HT211288
• https://support.apple.com/en-us/HT211289
• https://support.apple.com/en-us/HT211290
• https://support.apple.com/en-us/HT211291
• https://support.apple.com/en-us/HT211295

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