CVE-2026-86876

MEDIUM

5.2

CVSS Score

Published: September 14, 2026 at 08:51 PM UTC

Updated: October 20, 2026 at 12:50 AM UTC

5 products affected across 1 vendormacOSiPhone OSiPadOS

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Severity

MEDIUM5.2

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

An out-of-bounds write issue was addressed with improved bounds checking. 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, watchOS 27. A sandboxed process may be able to circumvent sandbox restrictions.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

iPadOS · Apple

95%

v < 26.7v < 27

Affected range stops below 26.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 27, so it looks safe — our inference, not a vendor statement

iPhone OS · Apple

95%

v < 26.7

Affected range stops below 26.7, so it looks safe — our inference, not a vendor statement

macOS · Apple

95%

v < 15.8v < 26.7v < 2715.0 ≤ v < 15.826.0 ≤ v < 26.7

Affected range stops below 15.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 26.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 27, so it looks safe — our inference, not a vendor statement

visionOS · Apple

95%

v < 27v < 27.0

Affected range stops below 27, so it looks safe — our inference, not a vendor statement

Affected range stops below 27.0, so it looks safe — our inference, not a vendor statement

watchOS · Apple

95%

v < 27v < 27.0

Affected range stops below 27, so it looks safe — our inference, not a vendor statement

Affected range stops below 27.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (7)

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/149034

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/149035

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/149037

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/149038

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/149041

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/149042

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/149043

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.2MEDIUM134c704f-9b21-4f2e-91b3-4a467353bcc0

Attack Vector: LOCAL
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: CHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-787

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