What’s Vulnerable › Vulnerabilities

CVE-2019-8538

• 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: 2020-10-27 · updated 2026-06-17

Description

A denial of service issue was addressed with improved validation. This issue is fixed in watchOS 5.2, macOS Mojave 10.14.4, Security Update 2019-002 High Sierra, Security Update 2019-002 Sierra, iOS 12.2. Processing a maliciously crafted vcf file may lead to a denial of service.

Affected products

• Apple Iphone Os: before 12.2 — fixed in 12.2
• macOS: from 10.14.3 before 10.14.4 — fixed in 10.14.4
• Apple watchOS: before 5.2 — fixed in 5.2

How to fix

Upgrade to a fixed version: Apple Iphone Os 12.2; macOS 10.14.4; Apple watchOS 5.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT209599
• https://support.apple.com/en-us/HT209600
• https://support.apple.com/en-us/HT209602
• https://support.apple.com/en-us/HT209599
• https://support.apple.com/en-us/HT209600
• https://support.apple.com/en-us/HT209602

Get alerted when CVE-2019-8538 or the next vulnerability affects your stack