High severity · published Oct 19, 2021
CVE-2021-30842
This issue was addressed with improved checks
7.8
CVSS
1.3%
EPSS
No
On KEV
Description
This issue was addressed with improved checks. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, Security Update 2021-005 Catalina, tvOS 15, iOS 15 and iPadOS 15, watchOS 8. Processing a maliciously crafted dfont file may lead to arbitrary code execution.
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)1.3% · higher than 71% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IO
iOS · Apple
before 14.8 · source: NVD
MA
macOS · Apple
11.0 before 11.6 · source: NVD
MO
Mac OS X · Apple
10.15 through 10.15.6; 10.15.7; 10.15.7; 10.15.7; 10.15.7; 10.15.7; +5 more · source: NVD
TV
Tvos · Apple
before 15.0 · source: NVD
WA
Watchos · Apple
before 8.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-30842
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-30842
Mailing List
http://seclists.org/fulldisclosure/2021/Oct/61
Mailing List
http://seclists.org/fulldisclosure/2021/Oct/62
Mailing List
http://seclists.org/fulldisclosure/2021/Oct/63
Release Notes
https://support.apple.com/en-us/HT212804
Release Notes
https://support.apple.com/en-us/HT212805
Release Notes
https://support.apple.com/en-us/HT212807
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