High severity · published Aug 24, 2021
CVE-2021-31010
Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability
In wildKEV
7.5
CVSS
3.7%
EPSS
Yes
On KEV
Description
A deserialization issue was addressed through improved validation. This issue is fixed in Security Update 2021-005 Catalina, iOS 12.5.5, iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, watchOS 7.6.2. A sandboxed process may be able to circumvent sandbox restrictions. Apple was aware of a report that this issue may have been actively exploited at the time of release..
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.7% · higher than 90% of CVEs
Exploited in the wildYes
CISA KEVListed Aug 25, 2022
Federal remediation dueSep 15, 2022
Ransomware campaign useNot known
Affected products
Which versions
MA
macOS · Apple
before 11.6; before 2021 · source: vendor, NVD
IO
iOS · Apple
before 14.8 · source: NVD
WA
watchOS · Apple
before 7.6; before 14.8; before 12.5 · source: vendor, 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; +11 more · source: NVD
IM
iOS, macOS, watchOS · Apple
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-31010
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-31010
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://support.apple.com/en-us/HT212804
x_refsource_MISC
https://support.apple.com/en-us/HT212805
x_refsource_MISC
https://support.apple.com/en-us/HT212807
x_refsource_MISC
https://support.apple.com/en-us/HT212806
x_refsource_MISC
https://support.apple.com/en-us/HT212824
More from macOS
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-2026-65400
Apple macOS Improper Authentication Vulnerability
9.8
CVE-2025-31200
Apple Multiple Products Memory Corruption Vulnerability
