What’s Vulnerable › Vulnerabilities

CVE-2021-1814

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-08 · updated 2026-06-17

Description

This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.3, watchOS 7.4. Processing a maliciously crafted image may lead to arbitrary code execution.

Affected products

• Apple macOS: before 11.3 — fixed in 11.3
• Apple watchOS: before 7.4 — fixed in 7.4

How to fix

Upgrade to a fixed version: Apple macOS 11.3; Apple watchOS 7.4. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212324
• https://support.apple.com/en-us/HT212325
• https://support.apple.com/en-us/HT212324
• https://support.apple.com/en-us/HT212325

Get alerted when CVE-2021-1814 or the next vulnerability affects your stack