CVE-2026-107824
CRITICAL 9.3x64dbg-MCP Server is a native Model Context Protocol (MCP) plugin for x64dbg that exposes the debugger's full functionality over HTTP. Prior to 1.1, x64dbg-MCP Server exposes all MCP debugger tools over HTTP and SSE without authentication while listening on 0.0.0.0 by default. Any unauthenticated network client that can reach the default port, 9094 for x64 or 9095 for x32, can execute arbitrary x64dbg commands, attach to processes by PID, read and write debuggee memory, and write files to arbitrary paths. This issue is fixed in version 1.1.
Severe if exploited (CVSS 9.3), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.4%chance of exploitation in 30 days · 34th percentile
Impact if exploited
9.3CVSS 4.0 · CRITICAL
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Data snapshot:
Weakness (CWE)
- CWE-306: : Missing Authentication for Critical Function
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References and research data (JSON)
All CVSS metrics
- CRITICAL 9.3 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CRITICAL 9.3 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
References
Advisories
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95929 EUVD · EUVD-2026-95929
Technical & other
- https://github.com/duty1g/x64dbg-mcp-server/security/advisories/GHSA-4478-h5jv-647m CVE record · GitHub_M · Updated 2026-10-09T17:45:17.458Z
NVD · CVE-2026-107824 · Updated 2026-10-16T16:00:33.533 - https://github.com/duty1g/x64dbg-mcp-server/security/advisories/GHSA-jgj3-97w2-9v9r CVE record · GitHub_M · Updated 2026-10-09T17:45:17.458Z
NVD · CVE-2026-107824 · Updated 2026-10-16T16:00:33.533 - https://github.com/duty1g/x64dbg-mcp-server/commit/1aad0f88b9c27233d11dbccf08ca415eb5f49203 CVE record · GitHub_M · Updated 2026-10-09T17:45:17.458Z
NVD · CVE-2026-107824 · Updated 2026-10-16T16:00:33.533 - https://github.com/duty1g/x64dbg-mcp-server/commit/e1daba0038959f88d25ff3376b2a7f922ffeb448 CVE record · GitHub_M · Updated 2026-10-09T17:45:17.458Z
NVD · CVE-2026-107824 · Updated 2026-10-16T16:00:33.533 - https://github.com/duty1g/x64dbg-mcp-server/releases/tag/1.0 CVE record · GitHub_M · Updated 2026-10-09T17:45:17.458Z
NVD · CVE-2026-107824 · Updated 2026-10-16T16:00:33.533 - https://github.com/duty1g/x64dbg-mcp-server/releases/tag/v1.1 CVE record · GitHub_M · Updated 2026-10-09T17:45:17.458Z
NVD · CVE-2026-107824 · Updated 2026-10-16T16:00:33.533