CVE-2026-51757

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-01. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

Incorrect access control in the meshSlaveUpdate function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to start a firmware download or flash workflow on the slave device via sending a crafted MQTT message to the cs_broker component.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 3, 2026

Advisory Details (3)

Auto-updated Sep 24, 2026
No patch confirmed yet.
generic

TOTOLINK | Wi-Fi 7, Mesh, 5G & Enterprise Networking

https://www.totolink.net/
generic

CVE-Vendor-Coordination/TOTOLINK/README.md at main · ShengWu00/CVE-Vendor-Coordination · GitHub

https://github.com/ShengWu00/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md
generic

CVE-Vendor-Coordination/TOTOLINK/README.md at main · ShengWu00/CVE-Vendor-Coordination · GitHub

https://github.com/DarkBoulder/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md

Vendor Advisories for CVE-2026-51757(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 52× in last 7d / 178× 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 178 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51757?
CVE-2026-51757 is a critical vulnerability published on September 1, 2026. Incorrect access control in the meshSlaveUpdate function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to start a firmware download or flash workflow on the slave device via sending a crafted MQTT message to the csbroker component.
When was CVE-2026-51757 disclosed?
CVE-2026-51757 was first published in the National Vulnerability Database on September 1, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51757 actively exploited?
CVE-2026-51757 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 51.6% of all scored CVEs.
What is the CVSS score of CVE-2026-51757?
CVE-2026-51757 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51757?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51757, 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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