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TI-2026-76685 Aliases CVE-2026-86919GHSA-h5xf-8gvq-cm89

Stack overflow in Apple iOS, macOS and visionOS allows code execution

Priority MEDIUM 40CWE-121Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
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-121 and the CVSS impact.

Summary

Apple iOS and iPadOS before 26.7 and before 27, macOS before 15.8, before 26.7 and before 27, and visionOS before 27 are affected. A stack-based buffer overflow (CWE-121) exists, which Apple addressed with improved input validation. An attacker with a paired Bluetooth device may be able to execute arbitrary code.

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

Description from the CNA

A stack overflow was addressed with improved input validation. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, visionOS 27. An attacker with a paired Bluetooth device may be able to execute arbitrary code.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00392 33rd percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 26.7, 27macOS (Apple): 15.8, 26.7, 27+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
AppleiOS and iPadOSbefore 26.7; before 2726.7, 27Patch availableCNA
ApplemacOSbefore 15.8; before 26.7; before 2715.8, 26.7, 27Patch 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 15.8; before 26.7; before 27 Fixed in 15.8, 26.7, 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

Update iOS and iPadOS to 26.7 or 27, macOS to 15.8, 26.7 or 27, and visionOS to 27.

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 15.8, 26.7, 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 15.8, 26.7, 27

    15 records Highest priority Priority MEDIUM 3 MEDIUM, 12 LOW

    Other records, highest priority first

    • TI-2026-76675 Authentication issue in Apple macOS lets attackers impersonate usersPriority MEDIUM 48
    • TI-2026-76672 Improper checks in Apple macOS lead to unexpected software executionPriority MEDIUM 41
    • TI-2026-76698 Out-of-bounds read in Apple operating systems can crash the systemPriority LOW 29
    Show all 15 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-2026-76698 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 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-2026-76698 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
    • TI-2026-76686 Apple iOS and macOS permissions flaw lets attackers overwrite filesPriority LOW 27
    Show all 8 records →

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-86919
  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-h5xf-8gvq-cm89
  6. 2026-10-21 CISA SSVC decision points changed
  7. 2026-10-22 Priority changed: LOW → MEDIUM

References

Other 6

  • 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