What’s Vulnerable › Vulnerabilities

CVE-2019-8657

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-12-18 · updated 2026-06-17
• Weakness: CWE-125

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, watchOS 5.3. Parsing a maliciously crafted office document may lead to an unexpected application termination or arbitrary code execution.

Affected products

• Apple Iphone Os: before 12.4 — fixed in 12.4
• macOS: before 10.14.6 — fixed in 10.14.6
• Apple tvOS: before 12.4 — fixed in 12.4
• Apple watchOS: before 5.3 — fixed in 5.3

How to fix

Upgrade to a fixed version: Apple Iphone Os 12.4; macOS 10.14.6; Apple tvOS 12.4; Apple watchOS 5.3. Check the vendor advisory for mitigations.

References

• https://support.apple.com/HT210346
• https://support.apple.com/HT210348
• https://support.apple.com/HT210351
• https://support.apple.com/HT210353
• https://support.apple.com/HT210346
• https://support.apple.com/HT210348
• https://support.apple.com/HT210351
• https://support.apple.com/HT210353

Get alerted when CVE-2019-8657 or the next vulnerability affects your stack