What’s Vulnerable › Vulnerabilities

CVE-2021-30788

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% 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 iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, Security Update 2021-005 Mojave, Security Update 2021-004 Catalina. Processing a maliciously crafted tiff file may lead to a denial-of-service or potentially disclose memory contents.

Affected products

• Apple Iphone Os: before 14.7 — fixed in 14.7
• macOS: from 10.14 through 10.14.5; from 10.15 through 10.15.6; 10.14.6, 10.14.6-security_update_2019-001, 10.14.6-security_update_2019-002, 10.14.6-security_update_2019-004, 10.14.6-security_update_2019-005, 10.14.6-security_update_2019-006 (+23)
• Apple macOS: before 11.5 — fixed in 11.5
• Apple tvOS: before 14.7 — fixed in 14.7
• Apple watchOS: before 7.6 — fixed in 7.6

How to fix

Upgrade to a fixed version: Apple Iphone Os 14.7; Apple macOS 11.5; Apple tvOS 14.7; Apple watchOS 7.6. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212600
• https://support.apple.com/en-us/HT212601
• https://support.apple.com/en-us/HT212602
• https://support.apple.com/en-us/HT212603
• https://support.apple.com/en-us/HT212604
• https://support.apple.com/en-us/HT212605
• https://support.apple.com/en-us/HT212600
• https://support.apple.com/en-us/HT212601
• https://support.apple.com/en-us/HT212602
• https://support.apple.com/en-us/HT212603
• https://support.apple.com/en-us/HT212604
• https://support.apple.com/en-us/HT212605

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