Apple Multiple Products Out-of-Bounds Write Vulnerability

HIGH 8.8EXPLOITED (CISA KEV)CVE-2026-86950 · Published 28/09/2026 · updated 27/10/2026

Apple Multiple Products Out-of-Bounds Write Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 29/09/2026. Patch affected systems as an emergency.

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

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.11 and iPadOS 18.7.11, iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1, macOS Tahoe 26.7.1. Processing a maliciously crafted file may lead to arbitrary code execution. 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 27.

References

support.apple.com/en-us/149225 · Release Notes
support.apple.com/en-us/149226 · Release Notes
support.apple.com/en-us/149228 · Release Notes
support.apple.com/en-us/149229 · Release Notes
seclists.org/fulldisclosure/2026/Sep/89 · Mailing List
seclists.org/fulldisclosure/2026/Sep/90 · Mailing List
seclists.org/fulldisclosure/2026/Sep/91 · Mailing List
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2026-86950

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