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TI-2021-01470 Aliases CVE-2021-1757GHSA-79x6-vr7j-wcm9

Out-of-bounds read in Apple iOS and iPadOS

Priority LOW 34CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A local attacker may be able to elevate their privileges.

Why it matters now

EPSS 0.0033 26th percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 14.4macOS (Apple): 11.2, 7.3, 14.4

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleiOS and iPadOSbefore 14.414.4Patch availableCNA
ApplemacOSbefore 11.211.2Patch availableCNA
ApplemacOSbefore 7.37.3Patch availableCNA
ApplemacOSbefore 14.414.4Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 14.4 Fixed in 14.4 Patch available CNA
  • macOS VendorApple Affected before 11.2 Fixed in 11.2 Patch available CNA
  • macOS VendorApple Affected before 7.3 Fixed in 7.3 Patch available CNA
  • macOS VendorApple Affected before 14.4 Fixed in 14.4 Patch available CNA

CPE configurations NVD · 22

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 14.4VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 14.4VulnerableApple
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*10.14 to before 10.14.6; 10.15 to before 10.15.7VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:-:*:*:*:*:*:*10.14.6VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-004:*:*:*:*:*:*10.14.6 security_update_2019-004VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-005:*:*:*:*:*:*10.14.6 security_update_2019-005VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-006:*:*:*:*:*:*10.14.6 security_update_2019-006VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-007:*:*:*:*:*:*10.14.6 security_update_2019-007VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-001:*:*:*:*:*:*10.14.6 security_update_2020-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-002:*:*:*:*:*:*10.14.6 security_update_2020-002VulnerableApple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions 10.14 to before 10.14.6; 10.15 to before 10.15.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:-:*:*:*:*:*:* Versions 10.14.6 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-004:*:*:*:*:*:* Versions 10.14.6 security_update_2019-004 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-005:*:*:*:*:*:* Versions 10.14.6 security_update_2019-005 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-006:*:*:*:*:*:* Versions 10.14.6 security_update_2019-006 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-007:*:*:*:*:*:* Versions 10.14.6 security_update_2019-007 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-001:*:*:*:*:*:* Versions 10.14.6 security_update_2020-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-002:*:*:*:*:*:* Versions 10.14.6 security_update_2020-002 Vulnerable ·Apple
Show 12 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-003:*:*:*:*:*:*10.14.6 security_update_2020-003VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-004:*:*:*:*:*:*10.14.6 security_update_2020-004VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-005:*:*:*:*:*:*10.14.6 security_update_2020-005VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-006:*:*:*:*:*:*10.14.6 security_update_2020-006VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-007:*:*:*:*:*:*10.14.6 security_update_2020-007VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:supplemental_update:*:*:*:*:*:*10.14.6 supplemental_updateVulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:supplemental_update_2:*:*:*:*:*:*10.14.6 supplemental_update_2VulnerableApple
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:supplemental_update:*:*:*:*:*:*10.15.7 supplemental_updateVulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*11.0 to before 11.2VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 14.4VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 7.3VulnerableApple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-003:*:*:*:*:*:* Versions 10.14.6 security_update_2020-003 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-004:*:*:*:*:*:* Versions 10.14.6 security_update_2020-004 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-005:*:*:*:*:*:* Versions 10.14.6 security_update_2020-005 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-006:*:*:*:*:*:* Versions 10.14.6 security_update_2020-006 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-007:*:*:*:*:*:* Versions 10.14.6 security_update_2020-007 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:supplemental_update:*:*:*:*:*:* Versions 10.14.6 supplemental_update Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:supplemental_update_2:*:*:*:*:*:* Versions 10.14.6 supplemental_update_2 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:supplemental_update:*:*:*:*:*:* Versions 10.15.7 supplemental_update Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 14.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 7.3 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 14.4
  • Fix · CNA macOS (Apple) Fixed in 11.2
  • Fix · CNA macOS (Apple) Fixed in 7.3
  • Fix · CNA macOS (Apple) Fixed in 14.4

Fixed in the same release

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

  • Release ·

    Apple macOS 11.2

    60 records Highest priority Priority CRITICAL 3 CRITICAL, 3 MEDIUM, 54 LOW

    Other records, highest priority first

    • TI-2021-01572 Apple iOS and iPadOS: A remote attacker may be able to cause arbitrary code executionPriority CRITICAL 100
    • TI-2021-01502 Type confusion in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2021-01495 Apple iOS and iPadOS: A malicious application may be able to elevate privilegesPriority CRITICAL 90
    Show all 60 records →
  • Release ·

    Apple iOS and iPadOS 14.4

    49 records Highest priority Priority CRITICAL 3 CRITICAL, 1 HIGH, 6 MEDIUM, 39 LOW

    Other records, highest priority first

    • TI-2021-01572 Apple iOS and iPadOS: A remote attacker may be able to cause arbitrary code executionPriority CRITICAL 100
    • TI-2021-01502 Type confusion in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2021-01495 Apple iOS and iPadOS: A malicious application may be able to elevate privilegesPriority CRITICAL 90
    Show all 49 records →
Show 2 more groups
  • Release ·

    Apple macOS 14.4

    35 records Highest priority Priority CRITICAL 2 CRITICAL, 2 MEDIUM, 31 LOW

    Other records, highest priority first

    • TI-2021-01502 Type confusion in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2021-01495 Apple iOS and iPadOS: A malicious application may be able to elevate privilegesPriority CRITICAL 90
    • TI-2021-01529 Apple iOS and iPadOS: A remote attacker may be able to cause unexpected application…Priority MEDIUM 47
    Show all 35 records →
  • Release ·

    Apple macOS 7.3

    34 records Highest priority Priority CRITICAL 2 CRITICAL, 2 MEDIUM, 30 LOW

    Other records, highest priority first

    • TI-2021-01502 Type confusion in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2021-01495 Apple iOS and iPadOS: A malicious application may be able to elevate privilegesPriority CRITICAL 90
    • TI-2021-01529 Apple iOS and iPadOS: A remote attacker may be able to cause unexpected application…Priority MEDIUM 47
    Show all 34 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-1757
  2. 2026-10-03 Alias added: GHSA-79x6-vr7j-wcm9

References

Advisory 4

  • 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