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Apple iOS, iPadOS, macOS, tvOS, visionOS, watchOS CVE-2026-43666

| EUVD-2026-29307 MEDIUM
Out-of-bounds Write (CWE-787)
2026-05-11 apple GHSA-cm8r-x63q-3wvp
6.2
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

5
Analysis Generated
May 12, 2026 - 18:26 vuln.today
CVSS changed
May 12, 2026 - 18:22 NVD
6.2 (MEDIUM)
Patch available
May 11, 2026 - 22:18 EUVD
CVE Published
May 11, 2026 - 20:07 nvd
UNKNOWN (no severity yet)
CVE Published
May 11, 2026 - 20:07 nvd
MEDIUM 6.2

DescriptionNVD

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An attacker on the local network may be able to cause a denial-of-service.

AnalysisAI

Out-of-bounds write in Apple operating systems allows local network attackers to cause denial-of-service via improved bounds checking bypass. Affects iOS/iPadOS (18.7.9+, 26.5+), macOS Sequoia (15.7.7+), Sonoma (14.8.7+), Tahoe (26.5+), tvOS (26.5+), visionOS (26.5+), and watchOS (26.5+). …

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CVE-2026-43666 vulnerability details – vuln.today

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