Man-in-the-Middle Attack in Apple iOS and macOS

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: Apple Inc.

Description

A cryptographic issue was addressed with improved integrity checks. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, watchOS 27. An attacker in a privileged network position may be able to modify network traffic.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-14

Last Modified

2026-09-14

Generated

2026-09-15

AI Q&A

2026-09-15

EPSS Evaluated

N/A

NVD

CVE-2026-84533

Affected Vendors & Products

Vendor	Product	Version / Range
apple	ios	27
apple	ipad_os	27
apple	macos_golden_gate	27
apple	tv_os	27
apple	watch_os	27

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is a cryptographic issue where improved integrity checks were implemented to prevent unauthorized modification of network traffic. It affects multiple Apple operating systems including iOS, iPadOS, macOS, tvOS, and watchOS versions 27. An attacker with a privileged network position could exploit this to alter network communications.

Impact Analysis

If exploited, this vulnerability could allow an attacker to intercept and modify your network traffic. This might lead to unauthorized access to sensitive data, such as login credentials or personal information, potentially resulting in identity theft or data breaches.

Mitigation Strategies

Update affected Apple devices to iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, or watchOS 27 to address the cryptographic integrity issue.

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