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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2026-0398
Authentication Bypass Vulnerability in Apple macOS

Original Issue Date:August 10, 2026

Severity Rating: HIGH

Software Affected

  • MacOS Sonoma versions prior to 14.8.9
  • MacOS Sequoia versions prior to 15.7.9
  • MacOS Tahoe versions prior to 26.6.1

Overview

A vulnerability has been reported in Apple macOS that could allow an attacker on the network to authenticate to screen sharing without valid credentials on the targeted system.

Target Audience:
Individuals and organizations using the affected versions of Apple macOS.

Risk Assessment:
High risk of unauthorized access and sensitive data disclosure.

Impact Assessment:
Potential for compromise on confidentiality and integrity of the system.

Description

Apple macOS is an operating system developed by Apple Inc. for Mac computers. It is designed to provide a secure, efficient, and seamless computing experience on Apple Mac computers.

A vulnerability has been reported in Apple macOS due to authentication issue in Screen Sharing.

Successful exploitation of this vulnerability could allow an attacker on the network to authenticate to Screen Sharing without valid credentials on the targeted system.

Solution

Apply appropriate updates as mentioned by the vendor:
https://support.apple.com/en-us/148170

https://support.apple.com/en-us/148171

https://support.apple.com/en-us/148172

Vendor Information

Apple
https://support.apple.com/en-us/148170
https://support.apple.com/en-us/148171
https://support.apple.com/en-us/148172

References

Apple
https://support.apple.com/en-us/148170
https://support.apple.com/en-us/148171
https://support.apple.com/en-us/148172

CVE Name
CVE-2026-65400

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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