VULNpocalypse

CVE-2026-107824: x64dbg-MCP Server exposes debugger operations to unauthenticated network clients

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

Generated by VEDAS. Scores as of 2026-11-11 15:49 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.

What it is

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.

Description quoted from the CVE record (assigned by GitHub_M, published 2026-10-09).

Weakness: CWE-306: Missing Authentication for Critical Function

How it can be exploited

Exploitable over the network with low attack complexity with no special attack requirements needing no privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. 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

CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: yes. Technical impact: total.

Public exploit evidence (Exploit Observer)

Exploit Observer found 2 code repositories naming this CVE.

Code repositories that name a CVE are often scanners, copies or fakes, and some are malware. Read the code before running anything.

See all 4 references on Exploit Observer

Live scores

EPSS
0.004
low predicted chance of attack
VEDAS
0.987
strong exploit evidence
On CISA KEV
Not listed
Detection rule
Nuclei

Who is affected

ProductAffectedNot affected
duty1g x64dbg-mcp-serverversion < 1.1Not stated

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

How to fix it

No fixed version or vendor advisory is listed in the CVE record yet. Watch the vendor’s security page.

How to detect it

Nuclei template (active check)

x64dbg-MCP Server - Missing Authentication on SSE Transport

x64dbg-MCP Server before 1.1 exposes all MCP debugger tools over HTTP and SSE with no authentication while listening on 0.0.0.0 by default (port 9094 for x64, 9095 for x32). Any unauthenticated client that can reach the port can execute arbitrary x64dbg commands, attach to processes, read and write debuggee memory, and write files to arbitrary paths. This template connects to the SSE endpoint with no credentials and confirms an MCP event stream is served, proving the transport is exposed without authentication.

Name and description quoted from the template, written by VEDAS.

The template sends 1 request (GET /sse); it decides using status, word matchers. Severity in the template: critical. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

bash
nuclei -u https://your-host -t CVE-2026-107824.yaml
Show the template (45 lines)
yaml
id: CVE-2026-107824

info:
  name: "x64dbg-MCP Server - Missing Authentication on SSE Transport"
  author: vedas-arpsyndicate
  severity: critical
  description: |
    x64dbg-MCP Server before 1.1 exposes all MCP debugger tools over HTTP and SSE with no authentication
    while listening on 0.0.0.0 by default (port 9094 for x64, 9095 for x32). Any unauthenticated client
    that can reach the port can execute arbitrary x64dbg commands, attach to processes, read and write
    debuggee memory, and write files to arbitrary paths. This template connects to the SSE endpoint with
    no credentials and confirms an MCP event stream is served, proving the transport is exposed without
    authentication.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2026-107824&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=x64dbg&match=exact
  classification:
    cvss-metrics: 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
    cvss-score: 9.3
    cve-id: CVE-2026-107824
    cwe-id: CWE-306
  metadata:
    verified: false
  tags: cve,cve2026,x64dbg,mcp,exposure

http:
  - raw:
      - |
        GET /sse HTTP/1.1
        Host: {{Hostname}}
        Accept: text/event-stream

    matchers-condition: and
    matchers:
      - type: word
        part: header
        words:
          - "text/event-stream"
      - type: word
        part: body
        words:
          - "event: endpoint"
      - type: status
        status:
          - 200

CVE-2026-107824.yaml on GitHub

References

Other references

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.

Supporting partners

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