How severe is CVE-2021-31010?

CVE-2021-31010 has a CVSS 3.1 base score of 7.5 (HIGH). EPSS estimates a 3.7% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2021-31010: Apple iOS, macOS, watchOS Sandbox Bypass

CISA Known Exploited Vulnerabilities

Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2022-08-25

Remediation due

2022-09-15

Required action
Apply updates per vendor instructions.

CISA notes
https://support.apple.com/en-us/HT212804, https://support.apple.com/en-us/HT212805, https://support.apple.com/en-us/HT212806, https://support.apple.com/en-us/HT212807, https://support.apple.com/en-us/HT212824; https://nvd.nist.gov/vuln/detail/CVE-2021-31010

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..

Severity

CVSS 3.1 · CISA7.5 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

SSVC · CISA-ADP

Exploitationactive

Automatableyes

Technical impactpartial

Affected Products

Vendor	Product	Affected versions
Apple	macOS	unspecified to <11.6
Apple	macOS	unspecified to <2021
Apple	watchOS	unspecified to <7.6
Apple	watchOS	unspecified to <14.8
Apple	watchOS	unspecified to <12.5

References

5 Links

Other references

Record Details

Published

2021-08-24

Last updated

2025-10-21

Assigner (CNA)

apple

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.