CVE-2026-63732

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-24. a secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.9Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 ) to achieve arbitrary code execution on the host operating system when the plugin's SSE endpoint is triggered.

CVSS v3
9.9
EG Score
9.9(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity99% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
61%
KEV
Not listed

Published

July 23, 2026

Last Modified

July 28, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

9router before 0.4.60 Remote Code Execution via default password | Advisories | VulnCheck

https://www.vulncheck.com/advisories/9router-before-remote-code-execution-via-default-password
github Patch Available🟡 PoC Available

Authenticated Remote Code Execution via Host Header Bypass and Unvalidated MCP Plugin Arguments · Advisory · decolua/9router · GitHub

https://github.com/decolua/9router/security/advisories/GHSA-4922-8r65-fq26

Vendor Advisories for CVE-2026-63732(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 31× in last 7d / 151× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 333 total refreshes for this CVE.

  1. 2026-09-15 09:46 UTCEG score recompute
  2. 2026-09-15 09:46 UTCGHSA enrichment
  3. 2026-09-14 16:11 UTCGHSA enrichment
  4. 2026-09-14 10:54 UTCGHSA enrichment
  5. 2026-09-14 06:43 UTCGHSA enrichment
  6. 2026-09-14 02:33 UTCGHSA enrichment
  7. 2026-09-13 22:22 UTCEG score recompute
  8. 2026-09-13 22:22 UTCGHSA enrichment
  9. 2026-09-13 15:28 UTCGHSA enrichment
  10. 2026-09-13 11:12 UTCGHSA enrichment
  11. 2026-09-13 06:40 UTCGHSA enrichment
  12. 2026-09-13 02:30 UTCGHSA enrichment
  13. 2026-09-12 22:19 UTCGHSA enrichment
  14. 2026-09-12 17:52 UTCEG score recompute
  15. 2026-09-12 17:52 UTCGHSA enrichment
  16. 2026-09-12 13:42 UTCGHSA enrichment
  17. 2026-09-12 09:31 UTCGHSA enrichment
  18. 2026-09-12 05:16 UTCGHSA enrichment
  19. 2026-09-12 01:05 UTCGHSA enrichment
  20. 2026-09-11 20:54 UTCGHSA enrichment
  21. 2026-09-11 16:41 UTCEG score recompute
  22. 2026-09-11 16:41 UTCGHSA enrichment
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 09:37 UTCEPSS rescore
  25. 2026-09-11 07:14 UTCGHSA enrichment
Show 75 more
  1. 2026-09-11 03:03 UTCGHSA enrichment
  2. 2026-09-10 20:56 UTCGHSA enrichment
  3. 2026-09-10 15:05 UTCEG score recompute
  4. 2026-09-10 15:05 UTCGHSA enrichment
  5. 2026-09-09 08:53 UTCEG score recompute
  6. 2026-09-09 08:53 UTCGHSA enrichment
  7. 2026-09-08 22:01 UTCEPSS rescore
  8. 2026-09-08 01:39 UTCGHSA enrichment
  9. 2026-09-07 21:28 UTCEG score recompute
  10. 2026-09-07 21:28 UTCGHSA enrichment
  11. 2026-09-07 16:01 UTCEPSS rescore
  12. 2026-09-06 16:53 UTCEG score recompute
  13. 2026-09-06 16:53 UTCGHSA enrichment
  14. 2026-09-06 13:47 UTCEPSS rescore
  15. 2026-09-06 12:42 UTCGHSA enrichment
  16. 2026-09-06 08:27 UTCGHSA enrichment
  17. 2026-09-06 03:51 UTCGHSA enrichment
  18. 2026-09-05 23:37 UTCGHSA enrichment
  19. 2026-09-05 19:27 UTCEG score recompute
  20. 2026-09-05 19:27 UTCGHSA enrichment
  21. 2026-09-05 15:31 UTCEPSS rescore
  22. 2026-09-05 06:57 UTCGHSA enrichment
  23. 2026-09-04 17:10 UTCEG score recompute
  24. 2026-09-04 17:10 UTCGHSA enrichment
  25. 2026-09-04 12:58 UTCEG score recompute
  26. 2026-09-04 12:58 UTCGHSA enrichment
  27. 2026-09-04 05:07 UTCEPSS rescore
  28. 2026-09-02 14:12 UTCEPSS rescore
  29. 2026-09-01 23:20 UTCEG score recompute
  30. 2026-09-01 23:20 UTCGHSA enrichment
  31. 2026-09-01 13:54 UTCEPSS rescore
  32. 2026-09-01 04:40 UTCEPSS rescore
  33. 2026-08-31 07:53 UTCGHSA enrichment
  34. 2026-08-31 02:59 UTCGHSA enrichment
  35. 2026-08-30 22:48 UTCEG score recompute
  36. 2026-08-30 22:48 UTCGHSA enrichment
  37. 2026-08-30 19:17 UTCEPSS rescore
  38. 2026-08-30 18:38 UTCGHSA enrichment
  39. 2026-08-30 14:27 UTCGHSA enrichment
  40. 2026-08-30 10:16 UTCGHSA enrichment
  41. 2026-08-30 04:39 UTCEG score recompute
  42. 2026-08-30 04:39 UTCGHSA enrichment
  43. 2026-08-30 01:22 UTCEPSS rescore
  44. 2026-08-30 00:28 UTCEG score recompute
  45. 2026-08-30 00:28 UTCGHSA enrichment
  46. 2026-08-28 21:42 UTCEPSS rescore
  47. 2026-08-28 01:29 UTCGHSA enrichment
  48. 2026-08-27 21:07 UTCGHSA enrichment
  49. 2026-08-27 14:26 UTCEG score recompute
  50. 2026-08-27 14:25 UTCGHSA enrichment
  51. 2026-08-27 14:25 UTCEPSS rescore
  52. 2026-08-27 10:09 UTCGHSA enrichment
  53. 2026-08-27 04:19 UTCGHSA enrichment
  54. 2026-08-27 00:07 UTCGHSA enrichment
  55. 2026-08-26 19:54 UTCEG score recompute
  56. 2026-08-26 19:54 UTCGHSA enrichment
  57. 2026-08-26 14:46 UTCEPSS rescore
  58. 2026-08-26 13:39 UTCGHSA enrichment
  59. 2026-08-26 09:00 UTCGHSA enrichment
  60. 2026-08-26 04:49 UTCGHSA enrichment
  61. 2026-08-26 00:38 UTCGHSA enrichment
  62. 2026-08-25 20:15 UTCGHSA enrichment
  63. 2026-08-25 16:04 UTCEG score recompute
  64. 2026-08-25 16:04 UTCGHSA enrichment
  65. 2026-08-25 13:49 UTCEPSS rescore
  66. 2026-08-25 11:54 UTCGHSA enrichment
  67. 2026-08-25 07:43 UTCGHSA enrichment
  68. 2026-08-25 03:33 UTCGHSA enrichment
  69. 2026-08-24 23:22 UTCGHSA enrichment
  70. 2026-08-24 19:12 UTCGHSA enrichment
  71. 2026-08-24 15:01 UTCEG score recompute
  72. 2026-08-24 15:01 UTCGHSA enrichment
  73. 2026-08-24 10:50 UTCEG score recompute
  74. 2026-08-24 10:50 UTCGHSA enrichment
  75. 2026-08-24 06:39 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-63732?
CVE-2026-63732 is a critical vulnerability published on July 23, 2026. 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 LOCALONLY network gate via a spoofed Host header, and unvalidated arguments passed to childprocess.spawn() when registering MCP…
When was CVE-2026-63732 disclosed?
CVE-2026-63732 was first published in the National Vulnerability Database on July 23, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63732 actively exploited?
CVE-2026-63732 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 38.8% of all scored CVEs.
What is the CVSS score of CVE-2026-63732?
CVE-2026-63732 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-63732?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63732, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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