What’s Vulnerable › Vulnerabilities

CVE-2021-30698

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% 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-476

Description

A null pointer dereference was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.4, Safari 14.1.1, iOS 14.6 and iPadOS 14.6. A remote attacker may be able to cause a denial of service.

Affected products

• Apple iPadOS: before 14.6 — fixed in 14.6
• Apple Iphone Os: before 14.6 — fixed in 14.6
• Apple macOS: from 11.0 before 11.4 — fixed in 11.4
• Apple Safari: before 14.1.1 — fixed in 14.1.1

How to fix

Upgrade to a fixed version: Apple iPadOS 14.6; Apple Iphone Os 14.6; Apple macOS 11.4; Apple Safari 14.1.1. 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/HT212534
• https://support.apple.com/en-us/HT212528
• https://support.apple.com/en-us/HT212529
• https://support.apple.com/en-us/HT212534

Get alerted when CVE-2021-30698 or the next vulnerability affects your stack