CVE-2026-63732 (GCVE-0-2026-63732)
Vulnerability from cvelistv5 – Published: 2026-07-23 21:16 – Updated: 2026-07-27 16:19
VLAI
EPSS
VEX
Title
9router before 0.4.60 Remote Code Execution via default password
Summary
9router 0.4.59 (fixed in 0.4.60) contains a chain of vulnerabilities: a hardcoded default password (123456) that authenticates any fresh installation, a bypass of the LOCAL_ONLY network gate via a spoofed Host header, and unvalidated arguments passed to child_process.spawn() when registering MCP plugins. A remote, unauthenticated attacker can log in with the default credential, spoof the Host header to reach local-only routes, and register a malicious MCP plugin (e.g. node -e <payload>) to achieve arbitrary code execution on the host operating system when the plugin's SSE endpoint is triggered.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-27 16:14 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/decolua/9router/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/9router-befo… | third-party-advisory |
Impacted products
Date Public
2026-07-03 00:00
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