CVE-2026-107824x64dbg-mcp-server Missing Authentication
x64dbg-MCP Server exposes debugger operations to unauthenticated network clients
Published Oct 9, 2026 · Updated Oct 16, 2026 · Also known as EUVD-2026-95929
Key Facts
Patch in the next maintenance window- CVE-2026-107824 is a critical-severity vulnerability (CVSS 9.3 v4) affecting x64dbg-mcp-server.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 0.4% probability of exploitation in the next 30 days.
- Fixed versions are available, including x64dbg-mcp-server 1.1.
- Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
Scores
CVSS v4
9.3
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
EPSS (30-day exploit likelihood)
0.4%
Higher than 33.0% of all scored CVEs
Exploit maturity
None known
ATLAS score
24/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
None known
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
Description
x64dbg-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.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| x64dbg-mcp-server | >= < 1.1 | 1.1 |
Patched Releases
x64dbg-mcp-server
1.1
Timeline
Publicly disclosed
Oct 9, 2026
Last updated
Oct 16, 2026
Weakness Type
- CWE-306 Missing Authentication for Critical Function
References
- advisorycve.org · CVERecord
- advisorynvd.nist.gov · CVE-2026-107824
- otherhttps://github.com/duty1g/x64dbg-mcp-server/commit/1aad0f88b9c27233d11dbccf08ca415eb5f49203
- otherhttps://github.com/duty1g/x64dbg-mcp-server/commit/e1daba0038959f88d25ff3376b2a7f922ffeb448
- otherhttps://github.com/duty1g/x64dbg-mcp-server/releases/tag/1.0
FAQ
Common Questions.
x64dbg-MCP Server is a native Model Context Protocol (MCP) plugin for x64dbg that exposes the debugger's full functionality over HTTP.
Affected: x64dbg-mcp-server versions >= < 1.1. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including x64dbg-mcp-server 1.1.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
Is CVE-2026-107824 On Your Attack Surface?
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