What’s Vulnerable › Vulnerabilities

CVE-2021-31008

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-24 · updated 2026-06-17
• Weakness: CWE-843

Description

A type confusion issue was addressed with improved memory handling. This issue is fixed in Safari 15.1, tvOS 15.1, iOS 15 and iPadOS 15, macOS Monterey 12.0.1, watchOS 8.1. Processing maliciously crafted web content may lead to code execution.

Affected products

• Apple iPadOS: before 15.0 — fixed in 15.0
• Apple Iphone Os: before 15.0 — fixed in 15.0
• Apple macOS: 12.0.0
• Apple Safari: before 15.1 — fixed in 15.1
• Apple tvOS: before 15.1 — fixed in 15.1
• Apple watchOS: before 8.1 — fixed in 8.1

How to fix

Upgrade to a fixed version: Apple iPadOS 15.0; Apple Iphone Os 15.0; Apple Safari 15.1; Apple tvOS 15.1; Apple watchOS 8.1. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212814
• https://support.apple.com/en-us/HT212869
• https://support.apple.com/en-us/HT212874
• https://support.apple.com/en-us/HT212875
• https://support.apple.com/en-us/HT212876
• https://support.apple.com/en-us/HT212814
• https://support.apple.com/en-us/HT212869
• https://support.apple.com/en-us/HT212874
• https://support.apple.com/en-us/HT212875
• https://support.apple.com/en-us/HT212876

Get alerted when CVE-2021-31008 or the next vulnerability affects your stack