CVE-2026-107824 duty1g CVE debrief

Who should care

Defenders responsible for systems using x64dbg-MCP Server, especially those in development or debugging environments, should assess exposure and prioritize upgrading to version 1.1 or later.

Why it matters

The vulnerability allows unauthenticated network clients to access and manipulate debugger operations, posing a critical risk to systems using x64dbg-MCP Server.

• Unauthenticated access to debugger operations
• Potential for arbitrary command execution
• Memory read and write capabilities
• File writing to arbitrary paths

Technical summary

The x64dbg-MCP Server plugin for x64dbg exposes debugger operations over HTTP and SSE without authentication. This allows unauthenticated network clients to execute arbitrary x64dbg commands, attach to processes, read and write debuggee memory, and write files to arbitrary paths. The plugin listens on 0.0.0.0 by default, making it accessible to any network client that can reach the default port (9094 for x64 or 9095 for x32). This issue is fixed in version 1.1, which likely addresses the authentication and exposure issues.

Defensive priority

Defenders should prioritize verifying exposure of x64dbg-MCP Server instances, especially those listening on public networks, and upgrade to version 1.1 or later.

Recommended defensive actions

• Verify x64dbg-MCP Server instances are not exposed to public networks
• Upgrade to version 1.1 or later
• Monitor for suspicious activity on x64dbg-MCP Server instances
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability, but additional verification is needed to confirm affected versions and instances. Specifically, defenders should verify the version of x64dbg-MCP Server in use and check for any instances exposed to public networks. The CVE record and source item provide a starting point for this verification, but further investigation may be necessary to ensure that all affected systems are identified and remediated.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.