CVE-2026-63732
Remote unauthenticated RCE in 9router via default creds, Host header bypass, and malicious plugin registration.
Is CVE-2026-63732 being exploited?
Not confirmed. CVE-2026-63732 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 1.0% probability of exploitation in the next 30 days.
How severe is CVE-2026-63732?
CVE-2026-63732 is rated Critical with a CVSS score of 9.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-63732?
Yes. A fix has been recorded for CVE-2026-63732. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-63732 affect?
CVE-2026-63732 affects 9router 0.4.59, 9router versions prior to 0.4.60, MCP plugin registration / SSE endpoint. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-63732?
Upgrade to 9router 0.4.60 immediately; restrict admin access and rotate credentials.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote unauthenticated attackers can log in with hardcoded password, bypass LOCAL_ONLY via Host header, register a plugin and execute OS commands (RCE).
Immediate action required
- affected< 0.4.60
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.