CVE-2026-86950
HIGH severity · CVSS 8.8 · Out-of-bounds write · actively exploited (CISA KEV)
8.8CVSS HIGH exploited
Actively exploited in the wild (CISA Known Exploited Vulnerabilities).
Added to KEV 2026-09-29. US federal agencies must patch by 2026-10-02.
Summary
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in 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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)1%
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Recommendation
This vulnerability is being actively exploited in the wild — patch affected products urgently. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://support.apple.com/en-us/149226Advisory
- https://support.apple.com/en-us/149228Advisory
- https://support.apple.com/en-us/149229Advisory
- http://seclists.org/fulldisclosure/2026/Sep/89Advisory
- http://seclists.org/fulldisclosure/2026/Sep/90Advisory
- http://seclists.org/fulldisclosure/2026/Sep/91Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-86950