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CVE-2021-31010

Apple iOS, macOS, watchOS Sandbox Bypass

7.5 HIGHActively exploited (CISA KEV)EPSS 3.67%
  1. Published24 Aug 2021
  2. Added to CISA KEV25 Aug 2022
  3. Remediation due15 Sept 2022
Actively exploited (CISA KEV)

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

Added to KEV: 25 Aug 2022Federal remediation due: 15 Sept 2022

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

Apple iPadOS< 14.8
Apple iPhone OS≥ 12.0 < 12.5.5 · ≥ 14.0 < 14.8
Apple macOS≥ 11.0 < 11.6
Apple Mac OS X≥ 10.15 < 10.15.7 · 10.15.7
Apple Watchos< 7.6.2

Remediation

Fixed in
Apple iPadOS≥ 14.8
Apple iPhone OS≥ 12.5.5
Apple macOS≥ 11.6
Apple Mac OS X≥ 10.15.7
Apple Watchos≥ 7.6.2

References

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Frequently asked

Is CVE-2021-31010 being actively exploited?

Yes. CVE-2021-31010 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 25 Aug 2022.

How severe is CVE-2021-31010?

CVE-2021-31010 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 3.67% probability of exploitation.

Which products are affected by CVE-2021-31010?

Affected products include Apple iPadOS, Apple iPhone OS, Apple macOS, Apple Mac OS X, Apple Watchos.

How do I fix CVE-2021-31010?

Upgrade affected software to a fixed version, for example Apple iPadOS 14.8, Apple iPhone OS 12.5.5, Apple macOS 11.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2021-31010 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.