What’s Vulnerable › Vulnerabilities

CVE-2019-8521

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-12-18 · updated 2026-06-17

Description

This issue was addressed with improved checks. This issue is fixed in iOS 12.2, macOS Mojave 10.14.4. A malicious application may be able to overwrite arbitrary files.

Affected products

• Apple Iphone Os: before 12.2 — fixed in 12.2
• macOS: before 10.14.4 — fixed in 10.14.4

How to fix

Upgrade to a fixed version: Apple Iphone Os 12.2; macOS 10.14.4. Check the vendor advisory for mitigations.

References

• https://support.apple.com/HT209599
• https://support.apple.com/HT209600
• https://support.apple.com/HT209599
• https://support.apple.com/HT209600

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