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TI-2020-07896 Aliases CVE-2020-9818GHSA-r647-89qj-xwmp

Out-of-bounds write in Apple iOS

Priority CRITICAL 97Exploited in the wildCWE-787Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 13.5 and iPadOS 13.5, iOS 12.4.7, watchOS 6.2.5. Processing a maliciously crafted mail message may lead to unexpected memory modification or application termination.

Why it matters now

Exploitation Active In CISA KEV since 2021-11-03CISA due date 2022-05-03
EPSS 0.02344 83rd percentileScored 2026-11-07
Fix Fixed iOS (Apple): iOS 13.5 and iPadOS 13.5iOS-1 (Apple): iOS 12.4.7+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleiOSbefore iOS 13.5 and iPadOS 13.5iOS 13.5 and iPadOS 13.5Patch availableCNA
AppleiOS-1before iOS 12.4.7iOS 12.4.7Patch availableCNA
ApplewatchOSbefore watchOS 6.2.5watchOS 6.2.5Patch availableCNA
  • iOS VendorApple Affected before iOS 13.5 and iPadOS 13.5 Fixed in iOS 13.5 and iPadOS 13.5 Patch available CNA
  • iOS-1 VendorApple Affected before iOS 12.4.7 Fixed in iOS 12.4.7 Patch available CNA
  • watchOS VendorApple Affected before watchOS 6.2.5 Fixed in watchOS 6.2.5 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 13.5VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 12.4.7; 13.0 to before 13.5VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 6.2.5VulnerableApple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 13.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 12.4.7; 13.0 to before 13.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 6.2.5 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS (Apple) Fixed in iOS 13.5 and iPadOS 13.5
  • Fix · CNA iOS-1 (Apple) Fixed in iOS 12.4.7
  • Fix · CNA watchOS (Apple) Fixed in watchOS 6.2.5

Fixed in the same release

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

  • Release ·

    Apple iOS iOS 13.5 and iPadOS 13.5

    42 records Highest priority Priority CRITICAL 1 CRITICAL, 2 HIGH, 8 MEDIUM, 31 LOW

    Other records, highest priority first

    • TI-2020-07926 Apple iOS: A remote attacker may be able to cause arbitrary code executionPriority HIGH 81
    • TI-2020-07897 Out-of-bounds write in Apple iOSPriority HIGH 79
    • TI-2020-07880 Apple iOS: Processing maliciously crafted web content may lead to arbitrary code executionPriority MEDIUM 51
    Show all 42 records →
  • Release ·

    Apple watchOS watchOS 6.2.5

    31 records Highest priority Priority CRITICAL 1 CRITICAL, 2 HIGH, 7 MEDIUM, 21 LOW

    Other records, highest priority first

    • TI-2020-07926 Apple iOS: A remote attacker may be able to cause arbitrary code executionPriority HIGH 81
    • TI-2020-07897 Out-of-bounds write in Apple iOSPriority HIGH 79
    • TI-2020-07880 Apple iOS: Processing maliciously crafted web content may lead to arbitrary code executionPriority MEDIUM 51
    Show all 31 records →
Show 1 more group
  • Release ·

    Apple iOS-1 iOS 12.4.7

    2 records Highest priority Priority CRITICAL 1 CRITICAL, 1 HIGH

    Other records, highest priority first

    Show all 2 records →

Timeline

  1. 2021-11-03 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2020-9818
  3. 2026-10-03 Alias added: GHSA-r647-89qj-xwmp

References

Advisory 3

  • 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