What’s Vulnerable › Vulnerabilities

CVE-2021-30905

• Severity: medium (CVSS 5.5 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: 2021-08-24 · updated 2026-06-17
• Weakness: CWE-125

Description

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 15.1 and iPadOS 15.1, macOS Monterey 12.0.1, tvOS 15.1, watchOS 8.1, Security Update 2021-007 Catalina. Processing a maliciously crafted file may disclose user information.

Affected products

• Apple iPadOS: before 14.8; 15.0 — fixed in 14.8
• Apple Iphone Os: before 14.8; 15.0 — fixed in 14.8
• macOS: from 10.15 before 10.15.7; 10.15.7, 10.15.7-security_update_2020-001, 10.15.7-security_update_2021-001, 10.15.7-security_update_2021-002, 10.15.7-security_update_2021-003, 10.15.7-security_update_2021-004 (+3) — fixed in 10.15.7
• Apple macOS: before 11.6.1; 12.0.0 — fixed in 11.6.1
• Apple tvOS: before 15.1 — fixed in 15.1
• Apple watchOS: before 8.1 — fixed in 8.1

How to fix

Upgrade to a fixed version: Apple iPadOS 14.8; Apple Iphone Os 14.8; macOS 10.15.7; Apple macOS 11.6.1; Apple tvOS 15.1; Apple watchOS 8.1. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212867
• https://support.apple.com/en-us/HT212869
• https://support.apple.com/en-us/HT212871
• https://support.apple.com/en-us/HT212874
• https://support.apple.com/en-us/HT212876
• https://support.apple.com/kb/HT212807
• https://support.apple.com/kb/HT212872
• https://www.zerodayinitiative.com/advisories/ZDI-21-1368/
• https://support.apple.com/en-us/HT212867
• https://support.apple.com/en-us/HT212869
• https://support.apple.com/en-us/HT212871
• https://support.apple.com/en-us/HT212874

Get alerted when CVE-2021-30905 or the next vulnerability affects your stack