CVE-2026-86914 Overview
CVE-2026-86914 is an information disclosure vulnerability in Apple macOS that allows a local application to access sensitive network connection information. Apple addressed the issue through improved state management across three macOS releases. The flaw is categorized under [CWE-200] (Exposure of Sensitive Information to an Unauthorized Actor) and requires local access with low privileges to exploit.
Critical Impact
A malicious or compromised application running on a vulnerable macOS system can enumerate sensitive network connection metadata without user interaction, enabling reconnaissance and lateral movement planning.
Affected Products
- Apple macOS Golden Gate (versions prior to 27)
- Apple macOS Sequoia (versions prior to 15.8)
- Apple macOS Tahoe (versions prior to 26.7)
Discovery Timeline
- 2026-10-20 - CVE-2026-86914 published to the National Vulnerability Database
- 2026-10-20 - Last updated in NVD database
Technical Details for CVE-2026-86914
Vulnerability Analysis
The vulnerability resides in macOS components that manage network connection state. Improper state management allows an application running in the local user context to read network connection information that should be restricted. Apple's advisory describes the fix as improved state management, indicating that transient or shared state was accessible to processes without proper isolation.
The confidentiality impact is high, while integrity and availability remain unaffected. An attacker leveraging this flaw gains visibility into network metadata such as active connections, remote endpoints, or interface state. This information can inform follow-on attacks against internal services or users.
Root Cause
The root cause is improper state management within macOS networking subsystems. Shared state tracking network connections was not consistently scoped or protected, allowing an unauthorized application to query or observe it. Apple's remediation enforces stricter state boundaries so sensitive data remains isolated from unprivileged callers.
Attack Vector
Exploitation requires local code execution on the macOS host with low privileges and no user interaction. An attacker first delivers or installs an application through phishing, supply-chain compromise, or an existing foothold. The application then invokes the vulnerable interface to read network connection details. The data gathered can be used to map internal infrastructure, identify VPN tunnels, or pivot toward higher-value systems.
No verified public proof-of-concept code is available. Refer to the Apple Support Article #149035, Apple Support Article #149042, and Apple Support Article #149043 for vendor technical details.
Detection Methods for CVE-2026-86914
Indicators of Compromise
- Unexpected processes querying network configuration APIs or reading from /var/run/ network state files.
- Non-system applications issuing frequent calls to networking frameworks such as SystemConfiguration or Network.framework outside their normal behavior profile.
- Unsigned or recently installed binaries enumerating network interfaces, routing tables, or active socket lists.
Detection Strategies
- Baseline macOS endpoint telemetry for processes that normally access network state, then alert on deviations by untrusted binaries.
- Monitor Endpoint Security Framework (ESF) events for suspicious use of networking APIs tied to non-system code signatures.
- Correlate installation of new user-space applications with subsequent network enumeration activity.
Monitoring Recommendations
- Collect process execution, code-signing, and system call telemetry from all macOS endpoints and forward to a centralized analytics platform.
- Track macOS version inventory to confirm all hosts have received the Golden Gate 27, Sequoia 15.8, or Tahoe 26.7 updates.
- Watch for repeated network state polling by the same non-privileged process, which may indicate reconnaissance.
How to Mitigate CVE-2026-86914
Immediate Actions Required
- Upgrade affected endpoints to macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7 as applicable to the device model.
- Audit installed applications and remove any software from untrusted sources or developers.
- Restrict installation of unsigned applications by enforcing Gatekeeper and notarization requirements through MDM policy.
Patch Information
Apple fixed CVE-2026-86914 in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. Patch guidance is documented in Apple Support Article #149035, Apple Support Article #149042, and Apple Support Article #149043. Deploy updates through Apple Software Update or an enterprise MDM solution and confirm patch status in asset inventory.
Workarounds
- No vendor-supplied workaround exists; applying the macOS update is the required remediation.
- Reduce exposure by limiting local user privileges and restricting the deployment of third-party applications on managed Macs.
- Enforce application allowlisting and code-signing requirements to limit which processes can execute on endpoints.
# Verify current macOS version and apply available updates
sw_vers -productVersion
sudo softwareupdate --list
sudo softwareupdate --install --all --restart
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
