What’s Vulnerable › Vulnerabilities

CVE-2021-30758

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% 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-843

Description

A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 14.7, Safari 14.1.2, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7. Processing maliciously crafted web content may lead to arbitrary code execution.

Affected products

• Apple Iphone Os: before 14.7 — fixed in 14.7
• Apple macOS: before 11.5 — fixed in 11.5
• Apple Safari: before 14.1.2 — fixed in 14.1.2
• Apple tvOS: before 14.7 — fixed in 14.7
• Apple watchOS: before 7.6 — fixed in 7.6

How to fix

Upgrade to a fixed version: Apple Iphone Os 14.7; Apple macOS 11.5; Apple Safari 14.1.2; Apple tvOS 14.7; Apple watchOS 7.6. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212601
• https://support.apple.com/en-us/HT212602
• https://support.apple.com/en-us/HT212604
• https://support.apple.com/en-us/HT212605
• https://support.apple.com/en-us/HT212606
• https://support.apple.com/en-us/HT212601
• https://support.apple.com/en-us/HT212602
• https://support.apple.com/en-us/HT212604
• https://support.apple.com/en-us/HT212605
• https://support.apple.com/en-us/HT212606

Get alerted when CVE-2021-30758 or the next vulnerability affects your stack