CVE-2026-20671
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Logic Issue in Apple OS Network Stack Enables Traffic Interception

Publication date: 2026-02-11

Last updated on: 2026-04-02

Assigner: Apple Inc.

Description
A logic issue was addressed with improved checks. This issue is fixed in iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An attacker in a privileged network position may be able to intercept network traffic.
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Meta Information
Published
2026-02-11
Last Modified
2026-04-02
Generated
2026-06-16
AI Q&A
2026-02-12
EPSS Evaluated
2026-06-15
NVD
CVE-2026-20671
EUVD
EUVD-2026-6724
Affected Vendors & Products
Showing 10 associated CPEs
Vendor Product Version / Range
apple tvos to 26.3 (exc)
apple visionos to 26.3 (exc)
apple watchos to 26.3 (exc)
apple ipados to 18.7.5 (exc)
apple ipados From 26.0 (inc) to 26.3 (exc)
apple iphone_os to 18.7.5 (exc)
apple iphone_os From 26.0 (inc) to 26.3 (exc)
apple macos From 15.0 (inc) to 15.7.4 (exc)
apple macos From 26.0 (inc) to 26.3 (exc)
apple macos From 14.0 (inc) to 14.8.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-77 The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
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Executive Summary

This vulnerability is a logic issue that has been addressed by implementing improved checks in various Apple operating systems. It allows an attacker who is in a privileged network position to potentially intercept network traffic.

Impact Analysis

If exploited, this vulnerability could allow an attacker with privileged network access to intercept your network traffic, potentially exposing sensitive information transmitted over the network.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, update your Apple devices to the fixed versions of the operating systems as soon as possible.

  • Update watchOS to version 26.3 or later.
  • Update tvOS to version 26.3 or later.
  • Update macOS Tahoe to version 26.3 or later.
  • Update macOS Sonoma to version 14.8.4 or later.
  • Update macOS Sequoia to version 15.7.4 or later.
  • Update iOS and iPadOS to versions 18.7.5 or later.
  • Update visionOS to version 26.3 or later.
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