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TI-2021-11373 Aliases CVE-2021-31010

Deserialization of untrusted data in Apple macOS

Priority CRITICAL 90Exploited in the wildCWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-502.

Summary

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..

Why it matters now

Exploitation Active In CISA KEV since 2022-08-25CISA due date 2022-09-15
EPSS 0.03673 89th percentileScored 2026-11-08
Fix Fixed macOS (Apple): 11.6, 2021watchOS (Apple): 7.6, 14.8, 12.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApplemacOSbefore 11.611.6Patch availableCNA
ApplemacOSbefore 20212021Patch availableCNA
ApplewatchOSbefore 7.67.6Patch availableCNA
ApplewatchOSbefore 14.814.8Patch availableCNA
ApplewatchOSbefore 12.512.5Patch availableCNA
  • macOS VendorApple Affected before 11.6 Fixed in 11.6 Patch available CNA
  • macOS VendorApple Affected before 2021 Fixed in 2021 Patch available CNA
  • watchOS VendorApple Affected before 7.6 Fixed in 7.6 Patch available CNA
  • watchOS VendorApple Affected before 14.8 Fixed in 14.8 Patch available CNA
  • watchOS VendorApple Affected before 12.5 Fixed in 12.5 Patch available CNA

CPE configurations NVD · 21

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 14.8VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*12.0 to before 12.5.5; 14.0 to before 14.8VulnerableApple
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*10.15 to before 10.15.7VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*10.15.7VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:*10.15.7 security_update_2020VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*10.15.7 security_update_2020-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-005:*:*:*:*:*:*10.15.7 security_update_2020-005VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-007:*:*:*:*:*:*10.15.7 security_update_2020-007VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*10.15.7 security_update_2021-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*10.15.7 security_update_2021-002VulnerableApple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.8 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions 12.0 to before 12.5.5; 14.0 to before 14.8 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions 10.15 to before 10.15.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:* Versions 10.15.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:* Versions 10.15.7 security_update_2020 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:* Versions 10.15.7 security_update_2020-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-005:*:*:*:*:*:* Versions 10.15.7 security_update_2020-005 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-007:*:*:*:*:*:* Versions 10.15.7 security_update_2020-007 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:* Versions 10.15.7 security_update_2021-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:* Versions 10.15.7 security_update_2021-002 Vulnerable ·Apple
Show 11 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*10.15.7 security_update_2021-003VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-006:*:*:*:*:*:*10.15.7 security_update_2021-006VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-007:*:*:*:*:*:*10.15.7 security_update_2021-007VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-008:*:*:*:*:*:*10.15.7 security_update_2021-008VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-001:*:*:*:*:*:*10.15.7 security_update_2022-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-002:*:*:*:*:*:*10.15.7 security_update_2022-002VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-003:*:*:*:*:*:*10.15.7 security_update_2022-003VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-004:*:*:*:*:*:*10.15.7 security_update_2022-004VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:*10.15.7 supplemental_updateVulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*11.0 to before 11.6VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 7.6.2VulnerableApple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:* Versions 10.15.7 security_update_2021-003 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-006:*:*:*:*:*:* Versions 10.15.7 security_update_2021-006 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-007:*:*:*:*:*:* Versions 10.15.7 security_update_2021-007 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-008:*:*:*:*:*:* Versions 10.15.7 security_update_2021-008 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-001:*:*:*:*:*:* Versions 10.15.7 security_update_2022-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-002:*:*:*:*:*:* Versions 10.15.7 security_update_2022-002 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-003:*:*:*:*:*:* Versions 10.15.7 security_update_2022-003 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-004:*:*:*:*:*:* Versions 10.15.7 security_update_2022-004 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:* Versions 10.15.7 supplemental_update Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.6 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 7.6.2 Vulnerable ·Apple

Remediation

  • Fix · CNA macOS (Apple) Fixed in 11.6
  • Fix · CNA macOS (Apple) Fixed in 2021
  • Fix · CNA watchOS (Apple) Fixed in 7.6
  • Fix · CNA watchOS (Apple) Fixed in 14.8
  • Fix · CNA watchOS (Apple) Fixed in 12.5

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apple macOS 11.6

    72 records Highest priority Priority CRITICAL 4 CRITICAL, 5 MEDIUM, 63 LOW

    Other records, highest priority first

    • TI-2021-11230 Use after free in Apple macOSPriority CRITICAL 97
    • TI-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11232 Integer overflow in Apple macOSPriority CRITICAL 93
    Show all 72 records →
  • Release ·

    Apple macOS 2021

    55 records Highest priority Priority CRITICAL 2 CRITICAL, 3 MEDIUM, 50 LOW

    Other records, highest priority first

    • TI-2021-11241 Type confusion in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11304 Out-of-bounds write in Apple watchOSPriority MEDIUM 51
    • TI-2021-11341 Incorrect authorization in Apple macOSPriority MEDIUM 41
    Show all 55 records →
Show 1 more group
  • Release ·

    Apple watchOS 7.6

    3 records Highest priority Priority CRITICAL 2 CRITICAL, 1 LOW

    Other records, highest priority first

    • TI-2021-11232 Integer overflow in Apple macOSPriority CRITICAL 93
    • TI-2021-11369 Incorrect default permissions in Apple macOSPriority LOW 26
    Show all 3 records →

Timeline

  1. 2022-08-25 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2021-31010

References

Advisory 5

  • TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2022-06854 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
See all 2382 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences