CVE-2026-86950
An out-of-bounds write issue was addressed with improved bounds checking.
- Severity: High
- CVSS 8.8
- EPSS 1.24%
- On CISA KEV
- Public exploit
- P1 · Patch now
Why P1: on CISA KEV.
Description
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.
CISA Known Exploited Vulnerability
Added 2026-09-29, remediation due 2026-10-13. Ransomware use: Unknown. Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for…
Affected products
- apple ipados < 26.7.1
- apple iphone os < 26.7.1
- apple macos < 15.8.1
- apple macos >= 26.0, < 26.7.1
- Apple Multiple Products Version details not specified by CISA
Weakness
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- NVD record NVD
- CVE Program record CVE Program
- Reference NVD
- Reference NVD
- Reference NVD
- Reference NVD
- GitHub security advisory GitHub
- CISA KEV catalog CISA