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TI-2021-01561 Aliases CVE-2021-1857GHSA-gr6c-576g-h3q2

Apple iOS and iPadOS: Processing maliciously crafted web content may disclose sensitive…

Priority LOW 31CWE-665Published · Updated

Key facts

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

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

Summary

A memory initialization issue was addressed with improved memory handling. This issue is fixed in iTunes 12.11.3 for Windows, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave, iCloud for Windows 12.3, macOS Big Sur 11.3, watchOS 7.4, tvOS 14.5, iOS 14.5 and iPadOS 14.5. Processing maliciously crafted web content may disclose sensitive user information.

Why it matters now

EPSS 0.01224 68th percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 14.5iTunes for Windows (Apple): 12.11+4 more products

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleiOS and iPadOSbefore 14.514.5Patch availableCNA
AppleiTunes for Windowsbefore 12.1112.11Patch availableCNA
AppleiCloud for Windowsbefore 12.312.3Patch availableCNA
AppletvOSbefore 14.514.5Patch availableCNA
ApplewatchOSbefore 7.47.4Patch availableCNA
ApplemacOSbefore 11.311.3Patch availableCNA
ApplemacOSbefore 20212021Patch availableCNA
ApplemacOSbefore 20212021Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 14.5 Fixed in 14.5 Patch available CNA
  • iTunes for Windows VendorApple Affected before 12.11 Fixed in 12.11 Patch available CNA
  • iCloud for Windows VendorApple Affected before 12.3 Fixed in 12.3 Patch available CNA
  • tvOS VendorApple Affected before 14.5 Fixed in 14.5 Patch available CNA
  • watchOS VendorApple Affected before 7.4 Fixed in 7.4 Patch available CNA
  • macOS VendorApple Affected before 11.3 Fixed in 11.3 Patch available CNA
  • macOS VendorApple Affected before 2021 Fixed in 2021 Patch available CNA
  • macOS VendorApple Affected before 2021 Fixed in 2021 Patch available CNA

CPE configurations NVD · 48

CPEVersionsRoleVendor
cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*before 12.3VulnerableApple
cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:*before 12.11.3VulnerableApple
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 14.5VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 14.5VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14:*:*:*:*:*:*:*10.14VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.0:*:*:*:*:*:*:*10.14.0VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.1:*:*:*:*:*:*:*10.14.1VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.2:*:*:*:*:*:*:*10.14.2VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.3:*:*:*:*:*:*:*10.14.3VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.4:*:*:*:*:*:*:*10.14.4VulnerableApple
  • cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:* Versions before 12.3 Vulnerable ·Apple
  • cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:* Versions before 12.11.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14:*:*:*:*:*:*:* Versions 10.14 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.0:*:*:*:*:*:*:* Versions 10.14.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.1:*:*:*:*:*:*:* Versions 10.14.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.2:*:*:*:*:*:*:* Versions 10.14.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.3:*:*:*:*:*:*:* Versions 10.14.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.4:*:*:*:*:*:*:* Versions 10.14.4 Vulnerable ·Apple
Show 38 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:apple:mac_os_x:10.14.4:beta4:*:*:*:*:*:*10.14.4 beta4VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.5:*:*:*:*:*:*:*10.14.5VulnerableApple
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:-:*:*:*:*:*:*10.14.6VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-001:*:*:*:*:*:*10.14.6 security_update_2019-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-002:*:*:*:*:*:*10.14.6 security_update_2019-002VulnerableApple
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: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:security_update_2021-001:*:*:*:*:*:*10.14.6 security_update_2021-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2021-002:*:*:*:*:*:*10.14.6 security_update_2021-002VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15:*:*:*:*:*:*:*10.15VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.1:*:*:*:*:*:*:*10.15.1VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.2:*:*:*:*:*:*:*10.15.2VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.3:*:*:*:*:*:*:*10.15.3VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.4:*:*:*:*:*:*:*10.15.4VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.5:*:*:*:*:*:*:*10.15.5VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.6:*:*:*:*:*:*:*10.15.6VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.6:-:*:*:*:*:*:*10.15.6VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.6:supplemental_update:*:*:*:*:*:*10.15.6 supplemental_updateVulnerableApple
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:-:*:*:*:*:*:*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:macos:*:*:*:*:*:*:*:*11.0 to before 11.3VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 14.5VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 7.4VulnerableApple
  • cpe:2.3:o:apple:mac_os_x:10.14.4:beta4:*:*:*:*:*:* Versions 10.14.4 beta4 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.5:*:*:*:*:*:*:* Versions 10.14.5 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:-:*:*:*:*:*:* Versions 10.14.6 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-001:*:*:*:*:*:* Versions 10.14.6 security_update_2019-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-002:*:*:*:*:*:* Versions 10.14.6 security_update_2019-002 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
  • 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:security_update_2021-001:*:*:*:*:*:* Versions 10.14.6 security_update_2021-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2021-002:*:*:*:*:*:* Versions 10.14.6 security_update_2021-002 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15:*:*:*:*:*:*:* Versions 10.15 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.1:*:*:*:*:*:*:* Versions 10.15.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.2:*:*:*:*:*:*:* Versions 10.15.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.3:*:*:*:*:*:*:* Versions 10.15.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.4:*:*:*:*:*:*:* Versions 10.15.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.5:*:*:*:*:*:*:* Versions 10.15.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.6:*:*:*:*:*:*:* Versions 10.15.6 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.6:-:*:*:*:*:*:* Versions 10.15.6 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.6:supplemental_update:*:*:*:*:*:* Versions 10.15.6 supplemental_update 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:-:*:*:*:*:*:* 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:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 14.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 7.4 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 14.5
  • Fix · CNA iTunes for Windows (Apple) Fixed in 12.11
  • Fix · CNA iCloud for Windows (Apple) Fixed in 12.3
  • Fix · CNA tvOS (Apple) Fixed in 14.5
  • Fix · CNA watchOS (Apple) Fixed in 7.4
  • Fix · CNA macOS (Apple) Fixed in 11.3
  • Fix · CNA macOS (Apple) Fixed in 2021
  • Fix · CNA macOS (Apple) Fixed in 2021

Fixed in the same release

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

  • Release ·

    Apple macOS 2021

    100 records Highest priority Priority HIGH 1 HIGH, 12 MEDIUM, 87 LOW

    Other records, highest priority first

    • TI-2021-11042 Missing authorization in Apple macOSPriority HIGH 82
    • TI-2021-11104 Apple macOS: An attacker in a privileged network position may be able to leak sensitive…Priority MEDIUM 50
    • TI-2021-11181 Out-of-bounds write in Apple Security Update - CatalinaPriority MEDIUM 48
    Show all 100 records →
  • Release ·

    Apple macOS 11.3

    62 records Highest priority Priority CRITICAL 3 CRITICAL, 1 HIGH, 9 MEDIUM, 49 LOW

    Other records, highest priority first

    • TI-2021-11050 Out-of-bounds write in Apple macOSPriority CRITICAL 97
    • TI-2021-11048 Integer overflow in Apple macOSPriority CRITICAL 97
    • TI-2021-11046 Use after free in Apple iOS and iPadOSPriority CRITICAL 97
    Show all 62 records →
Show 4 more groups
  • Release ·

    Apple iOS and iPadOS 14.5

    60 records Highest priority Priority CRITICAL 1 CRITICAL, 7 MEDIUM, 52 LOW

    Other records, highest priority first

    • TI-2021-11046 Use after free in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2021-01483 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 47
    • TI-2021-01568 Use after free in Apple iOS and iPadOSPriority MEDIUM 46
    Show all 60 records →
  • Release ·

    Apple watchOS 7.4

    43 records Highest priority Priority CRITICAL 1 CRITICAL, 5 MEDIUM, 37 LOW

    Other records, highest priority first

    • TI-2021-11046 Use after free in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2021-01483 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 47
    • TI-2021-01568 Use after free in Apple iOS and iPadOSPriority MEDIUM 46
    Show all 43 records →
  • Release ·

    Apple tvOS 14.5

    39 records Highest priority Priority CRITICAL 1 CRITICAL, 5 MEDIUM, 33 LOW

    Other records, highest priority first

    • TI-2021-11046 Use after free in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2021-01483 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 47
    • TI-2021-01568 Use after free in Apple iOS and iPadOSPriority MEDIUM 46
    Show all 39 records →
  • Release ·

    Apple iCloud for Windows, iTunes for Windows 12.11, 12.3

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2021-01522 Apple iOS and iPadOS: Processing a maliciously crafted font may result in the disclosure…Priority LOW 32
    • TI-2021-01534 Cross-site scripting in Apple iOS and iPadOSPriority LOW 30
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-1857
  2. 2026-10-03 Alias added: GHSA-gr6c-576g-h3q2

References

Advisory 8

  • TI-2019-06084 Type confusion in Apple iOS KEVCVSS 3.1HIGH 8.8
  • TI-2020-16987 Type confusion in Apple watchOS KEVCVSS 3.1HIGH 7.8
  • TI-2020-07926 Apple iOS: A remote attacker may be able to cause arbitrary code execution CVSS 3.1CRITICAL 9.8
  • TI-2018-03187 Memory corruption in Apple WebKit CVSS 3.1HIGH 8.8
  • TI-2018-03118 Memory corruption in Apple WebKit CVSS 3.0HIGH 8.8
  • TI-2018-03361 Memory corruption in iOS, tvOS, watchOS, Safari, iTunes for Windows, iCloud for Windows CVSS 3.0HIGH 8.8
See all 448 →

Sources

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