Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability

HIGH 7.5EXPLOITED (CISA KEV)CVE-2021-31010 · Published 24/08/2021 · updated 17/06/2026

Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 25/08/2022. Patch affected systems as an emergency.

Package	Affected versions	Patched versions
iOS, macOS, watchOS Apple	Versions not published yet (product named by CISA 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..

References

support.apple.com/en-us/HT212804 · Vendor Advisory
support.apple.com/en-us/HT212805 · Vendor Advisory
support.apple.com/en-us/HT212806 · Vendor Advisory
support.apple.com/en-us/HT212807 · Vendor Advisory
support.apple.com/en-us/HT212824 · Vendor Advisory
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2021-31010

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