CVE-2026-28837
Published: 25 March 2026
Summary
CVE-2026-28837 is a high-severity Improper Access Control (CWE-284) vulnerability in Apple Macos. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Data from Local System (T1005); ranked at the 14.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly enforces approved authorizations and checks to prevent apps from accessing sensitive user data, addressing the core logic issue in access control.
Remediates the specific logic flaw by identifying, reporting, and applying the macOS Tahoe 26.4 patch with improved checks.
Limits app access to only necessary sensitive user data via least privilege, reducing the impact of improper access control bypasses.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Improper access control (CWE-284) directly enables unauthorized reading of sensitive user data from the local macOS system, mapping to T1005 Data from Local System. Remote attack vector and lack of privileges/UI requirements support local data collection post-exploitation, but generic description limits precision.
NVD Description
A logic issue was addressed with improved checks. This issue is fixed in macOS Tahoe 26.4. An app may be able to access sensitive user data.
Deeper analysisAI
CVE-2026-28837 is a logic issue addressed through improved checks, affecting macOS versions prior to Tahoe 26.4. The vulnerability, classified under CWE-284 (Improper Access Control), enables an app to access sensitive user data. It carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N), highlighting its potential for high-impact confidentiality breaches.
Attackers can exploit this vulnerability remotely over the network with low complexity, requiring no privileges, authentication, or user interaction. Exploitation allows unauthorized access to sensitive user data, compromising confidentiality without impacting integrity or availability.
Apple's advisory confirms the issue is fixed in macOS Tahoe 26.4. Additional details are available at https://support.apple.com/en-us/126794.
Details
- CWE(s)