What’s Vulnerable › Vulnerabilities

CVE-2020-9889

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-16 · updated 2026-06-17
• Weakness: CWE-787

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8. Processing a maliciously crafted audio file may lead to arbitrary code execution.

Affected products

• Apple iPadOS: before 13.6 — fixed in 13.6
• Apple Iphone Os: before 13.6 — fixed in 13.6
• macOS: from 10.13 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 (+17) — 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 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/HT211288
• https://support.apple.com/HT211289
• https://support.apple.com/HT211290
• https://support.apple.com/HT211291
• https://www.zerodayinitiative.com/advisories/ZDI-20-1391/
• https://support.apple.com/HT211288
• https://support.apple.com/HT211289
• https://support.apple.com/HT211290
• https://support.apple.com/HT211291
• https://www.zerodayinitiative.com/advisories/ZDI-20-1391/

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