Apple Multiple Buffer Overflow Vulnerability

HIGH 7.8EXPLOITED (CISA KEV)CVE-2026-20700 · Published 11/02/2026 · updated 17/06/2026

Apple Multiple Buffer Overflow Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 12/02/2026. Patch affected systems as an emergency.

Package	Affected versions	Patched versions
Multiple Products Apple	Versions not published yet (product named by CISA KEV)

Description

A memory corruption issue was addressed with improved state management. This issue is fixed in iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 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.

References

support.apple.com/en-us/126346 · Release Notes
support.apple.com/en-us/126348 · Release Notes
support.apple.com/en-us/126351 · Release Notes
support.apple.com/en-us/126352 · Release Notes
support.apple.com/en-us/126353 · Release Notes
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2026-20700

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