CASCACascade Atlas

Evidence dossier

CVE-2021-31010

CVE-2021-31010

56.3–77.6Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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..

State
PUBLISHED
Published
Aug 24, 2021
Updated
Oct 21, 2025
Evidence coverage
72%
CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS3.67%

2026-07-18 · v2026.06.15 · percentile 88.4%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

appleoriginal assertion
container

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..

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

CISA KEVoriginal assertion
observed_exploitation

Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.036730000000; percentile 0.884230000000

Applicability

Cited product scope

Trace impact →
ApplemacOS
[{"status": "affected", "version": "unspecified", "lessThan": "11.6", "versionType": "custom"}]unknown
ApplemacOS
[{"status": "affected", "version": "unspecified", "lessThan": "2021", "versionType": "custom"}]unknown
ApplewatchOS
[{"status": "affected", "version": "unspecified", "lessThan": "7.6", "versionType": "custom"}]unknown
ApplewatchOS
[{"status": "affected", "version": "unspecified", "lessThan": "14.8", "versionType": "custom"}]unknown
ApplewatchOS
[{"status": "affected", "version": "unspecified", "lessThan": "12.5", "versionType": "custom"}]unknown
Unknown vendorUnknown product
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*; end excluding 14.8supported
Unknown vendorUnknown product
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*; start including 12.0; end excluding 12.5.5supported
Unknown vendorUnknown product
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*; start including 14.0; end excluding 14.8supported
Unknown vendorUnknown product
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*; start including 11.0; end excluding 11.6supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*; start including 10.15; end excluding 10.15.7supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-005:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-007:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-006:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-007:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-008:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-001:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-002:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-003:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-004:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*; end excluding 7.6.2supported

Assessments

CVSS by origin

7.5
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5.0
nvd@nist.govCVSS 2.0 · role PrimaryAV:N/AC:L/Au:N/C:N/I:P/A:N
7.5
134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.5
CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.