CVE-2021-31010

HIGH

7.5

CVSS Score

Published: August 24, 2021 at 06:51 PM UTC

Updated: June 17, 2026 at 03:51 AM UTC

4 products affected across 1 vendormacOSiPhone OSiPadOS

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Severity

HIGH7.5

Exploitation

CISA KEV

Exploit prediction

EPSS 4%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score3.7%

EPSS (Exploit Prediction Scoring System) estimates a 3.7% chance this CVE is exploited in the wild within the next 30 days — higher than 90% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

In affected versions of Apple iOS, macOS, and watchOS, a sandboxed process may be able to circumvent sandbox restrictions.

Required Action

Apply updates per vendor instructions.

Ransomware Use

Unknown

Added to KEV

Aug 25, 2022

Remediation Due

Sep 15, 2022

1507 days overdue

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..

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

iPadOS · Apple

95%

v < 14.8

Affected range stops below 14.8, so it looks safe — our inference, not a vendor statement

iPhone OS · Apple

95%

12.0 ≤ v < 12.5.514.0 ≤ v < 14.8

Affected range stops below 12.5.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 14.8, so it looks safe — our inference, not a vendor statement

macOS · Apple

95%

Affected range stops below 10.15.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 11.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 2021, so it looks safe — our inference, not a vendor statement

watchOS · Apple

95%

v < 12.5v < 14.8v < 7.6v < 7.6.2

Affected range stops below 12.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 14.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.6.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references