High severity · published Sep 8, 2021
CVE-2021-30774
A logic issue was addressed with improved validation
7.8
CVSS
1.2%
EPSS
No
On KEV
Description
A logic issue was addressed with improved validation. This issue is fixed in iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7. A malicious application may be able to gain root privileges.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IO
iOS · Apple
before 14.7 · source: NVD
MA
macOS · Apple
before 11.5 · source: NVD
MO
Mac OS X · Apple
10.15 before 10.15.7; 10.15.7; 10.15.7; 10.15.7; 10.15.7; 10.15.7; +3 more · source: NVD
TV
Tvos · Apple
before 14.7 · source: NVD
WA
Watchos · Apple
before 7.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-30774
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-30774
Release Notes
https://support.apple.com/en-us/HT212601
Release Notes
https://support.apple.com/en-us/HT212602
Release Notes
https://support.apple.com/en-us/HT212604
Release Notes
https://support.apple.com/en-us/HT212605
Vendor Advisory
https://support.apple.com/kb/HT212600
More from iOS
10.0
CVE-2025-43300
Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
10.0
CVE-2025-24201
Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability
10.0
CVE-2025-24085
Apple Multiple Products Use-After-Free Vulnerability
9.8
CVE-2025-31200
Apple Multiple Products Memory Corruption Vulnerability
9.8
CVE-2025-31201
Apple Multiple Products Arbitrary Read and Write Vulnerability