Anthropic has launched a new “Remote Control” feature for its agentic terminal tool, Claude Code. His capability allows developers to start tasks in their local terminal and continue managing them from a mobile device or browser.
Currently in Research Preview for Max users, the feature introduces new flexibility. However, it requires a close look at its technical architecture and security model.
The Remote Control feature, announced by the official Claude account on X (formerly Twitter), is designed to provide seamless session handoffs.
Architecture and Implementation
Activating the feature is done by running claude rc or claude remote-control in the terminal environment.
Users can also configure it to run by default using the /config command and setting “Enable Remote Control for all sessions” to true.
| Feature Parameter | Technical Spec | Security Context |
|---|---|---|
| Activation | claude rc | Starts outbound polling to Anthropic API |
| Default Setting | Config toggle | Can be enabled for all sessions |
| Network Exposure | Outbound HTTPS only | No open inbound ports |
| Encryption | TLS + short-lived tokens | Reduces hijacking risk |
| Concurrency | 1 active session | Prevents command conflicts |
| Timeout | 10-minute disconnect limit | Auto-terminates on network loss |
| Execution | Local machine | Full local file & MCP access |
| Access Tier | Research Preview | Currently limited availability |
Technically, Remote Control is not a cloud migration tool. When a session is initiated, the Claude Code agent continues executing entirely locally on the host machine.
This means all local Model Context Protocol (MCP) servers, environmental variables, and project configurations remain accessible.
The mobile app or web interface merely acts as a remote front-end for the local session. Because the execution remains local, there are specific limitations. Each Claude Code instance supports only one remote session at a time.
Furthermore, the local terminal process must remain active; if the terminal is closed or experiences a network outage lasting more than 10 minutes, the remote session will automatically time out and exit.
Security and Connection Protocol
According to the Claude announcement, a user can “kick off a task in your terminal and pick it up from your phone.”
Opening a local terminal session for remote web control raises inherent security concerns. Anthropic has designed the connection model to minimize network exposure.
The local Claude Code session relies strictly on outbound HTTPS requests. It does not open any inbound listening ports on the host machine.
Upon starting Remote Control, the local agent registers with the Anthropic API and begins polling for tasks.
When a user connects via the mobile client, the server routes messages through a secure streaming connection.
All traffic is encrypted over TLS, utilizing short-lived, single-purpose credentials that expire independently to reduce the risk of token theft or session hijacking.
Understanding the difference between Anthropic’s new execution modes is critical for threat modeling:
| Feature | Execution Location | Resource Access | Best Use Case |
|---|---|---|---|
| Remote Control | Local machine | Full local file and tool access | Remote monitoring and debugging |
| Code on the Web | Cloud VM | Sandboxed, limited access | Safe testing and parallel tasks |
While the TLS and outbound-only architecture provide network security, local agent vulnerabilities remain a concern.
Just before this release, another flaw, CVE-2025-59536, was uncovered, detailing Remote Code Execution (RCE) and API token exfiltration risks in Claude Code’s project configuration files and MCP integrations.
Anthropic quickly patched these issues by requiring explicit user consent before executing MCP or performing network operations.
However, this highlights that extending local terminal control to mobile devices means local repository hygiene is more critical than ever.
Follow us on Google News, LinkedIn, and X for daily cybersecurity updates. Contact us to feature your stories.
