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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 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 PROB
0%
EPSS %ILE
29%
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 5× in last 7d / 29× 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 253 total refreshes for this CVE.

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

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 0% probability of exploitation in the next 30 days, which ranks it in the top 71.0% of all scored CVEs.
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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