CVE-2026-20700
HIGHCVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
4Tags
Description
A memory corruption issue was addressed with improved state management. This issue is fixed in watchOS 26.3, tvOS 26.3, macOS Tahoe 26.3, visionOS 26.3, iOS 26.3 and iPadOS 26.3. An attacker with memory write capability may be able to execute arbitrary code. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 and CVE-2025-43529 were also issued in response to this report.
Analysis
Apple's kernel across all platforms (iOS, macOS, watchOS, visionOS, tvOS) contains a memory corruption vulnerability (CVE-2026-20700, CVSS 7.8) that allows attackers with memory write capability to execute arbitrary code at the kernel level. KEV-listed with Apple confirming reports of sophisticated in-the-wild exploitation, this represents an active zero-day targeting the Apple ecosystem at its most fundamental security boundary.
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Remediation
Within 24 hours: Inventory all Apple devices (mobile, desktop, wearables) in your environment and disable non-essential network access where feasible. Within 7 days: Implement enhanced endpoint monitoring for suspicious process behavior, memory access patterns, and lateral movement; escalate this to your SOC. …
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