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TI-2026-76686 Aliases CVE-2026-86921GHSA-c448-32wg-fc83

Apple iOS and macOS permissions flaw lets attackers overwrite files

Priority LOW 27CWE-269Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
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-269.

Summary

Apple iOS and iPadOS before 26.7 and before 27, macOS before 27 and visionOS before 27 are affected. A permissions flaw (CWE-269) lets a local attacker with no privileges and no user interaction overwrite restricted files. The flaw affects integrity.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

A permissions issue was addressed with improved validation. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, visionOS 27. A local attacker may be able to overwrite restricted files.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00142 3rd percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 26.7, 27macOS (Apple): 27+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
AppleiOS and iPadOSbefore 26.7; before 2726.7, 27Patch availableCNA
ApplemacOSbefore 2727Patch availableCNA
ApplevisionOSbefore 2727Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 26.7; before 27 Fixed in 26.7, 27 Patch available CNA
  • macOS VendorApple Affected before 27 Fixed in 27 Patch available CNA
  • visionOS VendorApple Affected before 27 Fixed in 27 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*——Apple
  • cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:* Versions — — ·Apple

Remediation

Apple fixes this in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27 and visionOS 27. Update to these versions or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 26.7, 27
  • Fix · CNA macOS (Apple) Fixed in 27
  • Fix · CNA visionOS (Apple) Fixed in 27

Fixed in the same release

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

  • Release ·

    Apple macOS 27

    16 records Highest priority Priority MEDIUM 1 MEDIUM, 15 LOW

    Other records, highest priority first

    • TI-2026-76687 Type confusion in Apple Safari and iOS allows code executionPriority MEDIUM 40
    • TI-2026-76654 Apple macOS may launch maliciously modified appsPriority LOW 38
    • TI-2026-76700 Race condition in Apple iOS, iPadOS and macOS lets apps escape sandboxPriority LOW 35
    Show all 16 records →
  • Release ·

    Apple visionOS 27

    14 records Highest priority Priority MEDIUM 2 MEDIUM, 12 LOW

    Other records, highest priority first

    • TI-2026-76687 Type confusion in Apple Safari and iOS allows code executionPriority MEDIUM 40
    • TI-2026-76685 Stack overflow in Apple iOS, macOS and visionOS allows code executionPriority MEDIUM 40
    • TI-2026-76698 Out-of-bounds read in Apple operating systems can crash the systemPriority LOW 29
    Show all 14 records →
Show 1 more group
  • Release ·

    Apple iOS and iPadOS 26.7, 27

    8 records Highest priority Priority MEDIUM 1 MEDIUM, 7 LOW

    Other records, highest priority first

    • TI-2026-76685 Stack overflow in Apple iOS, macOS and visionOS allows code executionPriority MEDIUM 40
    • TI-2026-76698 Out-of-bounds read in Apple operating systems can crash the systemPriority LOW 29
    • TI-2026-76674 Out-of-bounds write in Apple operating systems can crash devicesPriority LOW 29
    Show all 8 records →

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-86921
  2. 2026-10-20 CVSS score added · CISA ADP
  3. 2026-10-20 Weakness changed · CISA ADP
  4. 2026-10-20 CISA SSVC decision points changed
  5. 2026-10-20 Alias added: GHSA-c448-32wg-fc83

References

Other 4

  • TI-2026-46583 Improper authentication in Apple macOS KEVCVSS 3.1CRITICAL 9.8
  • 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
See all 9536 →

Sources

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