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CVE-2026-86950highunder attackCWE-787

CVE-2026-86950

71Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.

ssvc Actcvss 8.8epss 1.2%
from disclosure to weapon0 days
Published on NVDSep 28
1st PoCSep 28
CISA KEV+1d
exploitation probability
1.2%top 32% of all CVEs
observed exploitation
yesCISA + VulnCheck
2 public exploit(s)
Action required by CISAfederal deadline: 2026-10-02

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.

In short

A flaw allows attackers to write data outside intended memory boundaries when processing specially crafted files, potentially leading to complete system compromise. This affects iPhone, iPad, and Mac users and has been actively exploited in real attacks.

Technical detail

An out-of-bounds write vulnerability (CWE-787) in file processing allows an attacker to overflow memory buffers via maliciously crafted input, enabling arbitrary code execution with the privileges of the affected application. The vulnerability requires user interaction (file processing) and affects iOS, iPadOS, and macOS versions prior to specified patches; exploitation has been documented in targeted attacks.

Summary generated and translated by AI from the official 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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