What’s Vulnerable › Vulnerabilities

CVE-2021-30686

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-08 · updated 2026-06-17
• Weakness: CWE-125

Description

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Security Update 2021-003 Catalina, macOS Big Sur 11.4, watchOS 7.5. Processing a maliciously crafted audio file may disclose restricted memory.

Affected products

• Apple iPadOS: before 14.6 — fixed in 14.6
• Apple Iphone Os: before 14.6 — fixed in 14.6
• macOS: from 10.15 through 10.15.6; 10.15.7, 10.15.7-security_update_2020, 10.15.7-security_update_2020-001, 10.15.7-security_update_2020-005, 10.15.7-security_update_2020-007, 10.15.7-security_update_2021-001 (+2)
• Apple macOS: from 11.0 before 11.4 — fixed in 11.4
• Apple tvOS: before 14.6 — fixed in 14.6
• Apple watchOS: before 7.5 — fixed in 7.5

How to fix

Upgrade to a fixed version: Apple iPadOS 14.6; Apple Iphone Os 14.6; Apple macOS 11.4; Apple tvOS 14.6; Apple watchOS 7.5. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212528
• https://support.apple.com/en-us/HT212529
• https://support.apple.com/en-us/HT212530
• https://support.apple.com/en-us/HT212532
• https://support.apple.com/en-us/HT212533
• https://support.apple.com/en-us/HT212528
• https://support.apple.com/en-us/HT212529
• https://support.apple.com/en-us/HT212530
• https://support.apple.com/en-us/HT212532
• https://support.apple.com/en-us/HT212533

Get alerted when CVE-2021-30686 or the next vulnerability affects your stack