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CISA KEV · Known exploitedHigh

CVE-2021-31010

Apple iOS, macOS, watchOS

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
7.5
EPSS
3.67%
88.6% percentile
CISA KEV
Listed
Published
2021.08.25
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability3.67%
Technical severityCVSS 7.5

Vulnerability overview

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 product and versions

Product
Apple iOS, macOS, watchOS
Affected versions
unspecified, < 14.8, >= 12.0 < 12.5.5, >= 14.0 < 14.8, >= 10.15 < 10.15.7, 10.15.7, >= 11.0 < 11.6, < 7.6.2
Fixed versions
14.8, 12.5.5, 10.15.7, 11.6, 7.6.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2022.09.15
  1. 1
    Identify

    Confirm that Apple iOS, macOS, watchOS and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
CWE-20, CWE-502
KEV added
2022.08.25
Ransomware use
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