---
title: "CVE-2026-86950: Apple Multiple Products Out-of-Bounds Write Vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-86950/
description: "CVE-2026-86950 (Apple Multiple Products): Exploited in the wild (CISA KEV). An out-of-bounds write issue was addressed with improved bounds checking. This…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-28
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-86950"
kev: true
cvss: 8.8
epss: 0.01242
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-86950: Apple Multiple Products Out-of-Bounds Write Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Apple Multiple Products. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-09-29, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-10-13 ; treat that as the outer limit, not the target.
- EPSS 1.2% , percentile 69: FIRST’s model estimates a 1.2% chance of exploitation activity in the next 30 days, higher than 69% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.
- Editorial verdict: Patch this week. Apple CoreGraphics CVE-2026-86950: Exploited Zero-Day — A targeted file-parsing zero-day with a fix out since September 28: confirm every iPhone, iPad and Mac is on 26.7.1, 15.8.1 or a 27.x release this week, and today for high-risk users.

## What it is

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.

## Affected products (CVE record)

- Apple iOS and iPadOS: < 26.7.1
- Apple macOS: < 15.8.1, < 26.7.1

## Severity

- CISA-ADP CVSS 3.1: 8.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2026-09-29; federal due date 2026-10-13. Known ransomware use: Unknown.
- CISA 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.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.24% probability of exploitation activity in the next 30 days; percentile 69.

## Sources

- [Listed in CISA KEV notes (support.apple.com)](https://support.apple.com/en-us/149226)
- [Listed in CISA KEV notes (support.apple.com)](https://support.apple.com/en-us/149228)
- [Listed in CISA KEV notes (support.apple.com)](https://support.apple.com/en-us/149229)
- [CVE.org record CVE-2026-86950](https://www.cve.org/CVERecord?id=CVE-2026-86950)
- [NVD entry CVE-2026-86950](https://nvd.nist.gov/vuln/detail/CVE-2026-86950)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-86950)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk)
- [seclists.org](http://seclists.org/fulldisclosure/2026/Sep/89)
- [seclists.org](http://seclists.org/fulldisclosure/2026/Sep/90)
- [seclists.org](http://seclists.org/fulldisclosure/2026/Sep/91)

---
Source page: https://erroneo.us/security/cve/CVE-2026-86950/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt