CVE-2020-37220

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-13. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

Huawei HG630 V2 router contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain administrative access by retrieving the device serial number. Attackers can query the /api/system/deviceinfo endpoint without authentication to extract the SerialNumber field, then use the last 8 characters as the default password to log in to the router.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
28.1%
KEV
Not listed

Published

May 13, 2026

Last Modified

May 26, 2026

Advisory Details (3)

Auto-updated Jun 7, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic
https://www.youtube.com/watch?v=vOrIL7L_cVc
generic

Huawei HG630 V2 Router Authentication Bypass via Serial Number | Advisories | VulnCheck

https://www.vulncheck.com/advisories/huawei-hg630-v2-router-authentication-bypass-via-serial-number
generic🟡 PoC Available

Huawei HG630 2 Router - Authentication Bypass - Hardware webapps Exploit

https://www.exploit-db.com/exploits/48310

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 49× 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 170 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2020-37220?
CVE-2020-37220 is a high vulnerability published on May 13, 2026. Huawei HG630 V2 router contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain administrative access by retrieving the device serial number. Attackers can query the /api/system/deviceinfo endpoint without authentication to extract the SerialNumber field, then…
When was CVE-2020-37220 disclosed?
CVE-2020-37220 was first published in the National Vulnerability Database on May 13, 2026, with the most recent update on May 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-37220 actively exploited?
CVE-2020-37220 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 28.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-37220?
CVE-2020-37220 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2020-37220?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-37220, 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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