CVE-2026-86950
Apple Multiple Products Out-of-Bounds Write Vulnerability
IN CISA KEV
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.
- Vendor
- Apple
- Product
- Multiple Products
- CVSS 3.1
- 8.8 (high), scored by 134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CWE
- CWE-787
- Published
- 2026-09-28
- NVD modified
- 2026-10-01
- NVD status
- Analyzed
CISA KEV
- Date added
- 2026-09-29
- Due date
- 2026-10-13
- Ransomware use
- Unknown
- Required action
- 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 evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
EPSS
1.24% chance of exploitation in the next 30 days (percentile 68th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- support.apple.com (Release Notes, Vendor Advisory)
- support.apple.com (Release Notes, Vendor Advisory)
- support.apple.com (Release Notes, Vendor Advisory)
- seclists.org (Mailing List, Third Party Advisory)
- seclists.org (Mailing List, Third Party Advisory)
- seclists.org (Mailing List, Third Party Advisory)
- www.cisa.gov (US Government Resource)
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.