CVE-2026-43787

macOS Logic Flaw Allows Sensitive Data Leakage from Privileged Network

Published Sep 14, 2026 CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Description
A logic issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An attacker in a privileged network position may be able to leak sensitive user information.

Analysis

AI-generated

Technical impact

A logic flaw in macOS allows an attacker with a privileged network position to gain unauthorized access to sensitive user information by bypassing insufficient checks. The vulnerability could expose confidential data, potentially leading to privacy violations or further exploitation by an insider or compromised device.

Affected Systems

Apple macOS versions preceding macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7 are affected. Any installations with older releases are susceptible to this logic issue.

Risk and Exploitability

The CVSS score of 5.9 indicates medium severity, while the EPSS score of < 1% suggests a very low likelihood of exploitation. The flaw is not listed in the CISA KEV catalog. Exploitation requires an attacker to be in a privileged network position; no public exploits are documented, so the risk is largely confined to environments where internal or compromised network access is possible.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade to macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7 to apply the fix.
  • Enforce network segmentation to restrict privileged zones from accessing macOS systems that could contain sensitive data.
  • Monitor logs for unusual data access patterns and alert on potential data exfiltration attempts.

Generated by OpenCVE AI on September 20, 2026 at 20:20 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title macOS Logic Flaw Allows Sensitive Data Leakage from Privileged Network
Type Values Removed Values Added
CPEs cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Weaknesses CWE-693
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Privileged Network Data Leak via macOS Logic Error
Weaknesses CWE-200
CWE-284
Type Values Removed Values Added
Title Privileged Network Data Leak via macOS Logic Error
Weaknesses CWE-200
CWE-284
Type Values Removed Values Added
First Time appeared Apple
Apple macos
Vendors & Products Apple
Apple macos
Type Values Removed Values Added
Description A logic issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An attacker in a privileged network position may be able to leak sensitive user information.
References
Weaknesses
  • CWE-693

    Protection Mechanism Failure

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Oct 26, 2026, 8:36 PM
Reserved
May 1, 2026, 10:46 PM
Status
Analyzed
Published
Sep 14, 2026, 9:17 PM
Modified
Sep 17, 2026, 4:56 PM