CVE-2026-67966

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-17. 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 weekElevated
9.8EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.8Exploit: No code on recordExposed services: Not assessed

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

Tenda W20E V16.01.0.6(2782) /goform/telnet endpoint allows unauthenticated remote attackers to activate the Telnet daemon and obtain root shell access.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100

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 (value × EchelonGraph’s weight)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.6%
EPSS %ILE
46th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

Published

August 17, 2026

Last Modified

August 31, 2026

Advisory Details (1)

Auto-updated Oct 5, 2026
No fix on record yet.
generic

GitHub - H0111mes/Tenda-W20E-Vulnerability-Disclosure · GitHub

https://github.com/H0111mes/Tenda-W20E-Vulnerability-Disclosure

Vendor Advisories for CVE-2026-67966(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 22× in last 7d / 160× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 338 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 238 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  2. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  3. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  4. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  5. 2026-10-07 06:29 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-10-07 02:17 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-06 21:54 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  8. 2026-10-06 17:14 UTCEG score recompute
  9. 2026-10-06 17:14 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  11. 2026-10-06 13:10 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-06 09:05 UTCEG score recompute
  13. 2026-10-06 09:05 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  15. 2026-10-05 17:26 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-10-05 11:58 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-10-05 06:42 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-10-05 01:58 UTCEG score recompute
  19. 2026-10-05 01:58 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  21. 2026-10-04 21:52 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-04 16:26 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-10-04 11:50 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-04 07:21 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-10-04 03:18 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
Show 75 more
  1. 2026-10-03 19:24 UTCEG score recompute
  2. 2026-10-03 19:24 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  4. 2026-10-03 00:46 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-10-02 19:51 UTCEG score recompute
  6. 2026-10-02 19:51 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  8. 2026-10-02 15:48 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-02 06:59 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-10-02 01:56 UTCEG score recompute
  11. 2026-10-02 01:56 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  13. 2026-10-01 13:56 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-10-01 09:53 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-01 05:49 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-10-01 01:31 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-09-30 20:53 UTCEG score recompute
  18. 2026-09-30 20:53 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  20. 2026-09-30 10:14 UTCEG score recompute
  21. 2026-09-30 10:14 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-09-29 06:31 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-09-29 02:27 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-09-28 22:00 UTCEG score recompute
  25. 2026-09-28 22:00 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  26. 2026-09-28 14:53 UTCEG score recompute
  27. 2026-09-28 14:53 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  28. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  29. 2026-09-28 10:47 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  30. 2026-09-28 06:32 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  31. 2026-09-28 02:28 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  32. 2026-09-27 22:25 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  33. 2026-09-27 16:33 UTCEG score recompute
  34. 2026-09-27 16:33 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  35. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  36. 2026-09-27 12:25 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  37. 2026-09-27 08:20 UTCEG score recompute
  38. 2026-09-27 08:20 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  39. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  40. 2026-09-25 10:24 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  41. 2026-09-25 06:19 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  42. 2026-09-25 02:16 UTCEG score recompute
  43. 2026-09-25 02:16 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  44. 2026-09-24 13:32 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  45. 2026-09-24 09:20 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  46. 2026-09-24 05:17 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  47. 2026-09-24 01:10 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  48. 2026-09-23 21:07 UTCEG score recompute
  49. 2026-09-23 21:07 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  50. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  51. 2026-09-23 17:03 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  52. 2026-09-23 12:59 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  53. 2026-09-23 08:55 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  54. 2026-09-23 04:52 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  55. 2026-09-23 00:48 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  56. 2026-09-22 20:44 UTCEG score recompute
  57. 2026-09-22 20:44 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  58. 2026-09-22 15:10 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  59. 2026-09-22 11:07 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  60. 2026-09-22 07:03 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  61. 2026-09-22 02:58 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  62. 2026-09-21 22:49 UTCEG score recompute
  63. 2026-09-21 22:49 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  64. 2026-09-21 18:44 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  65. 2026-09-21 12:22 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  66. 2026-09-21 08:18 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  67. 2026-09-21 03:51 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  68. 2026-09-20 23:47 UTCEG score recompute
  69. 2026-09-20 23:47 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  70. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  71. 2026-09-20 18:57 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  72. 2026-09-20 14:53 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  73. 2026-09-20 09:48 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  74. 2026-09-20 03:42 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8
  75. 2026-09-19 23:38 UTCGHSA enrichmentGHSA-48vf-q85h-3hw9 · GitHub severity CRITICAL · GitHub CVSS 9.8

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67966?
CVE-2026-67966 is a critical vulnerability published on August 17, 2026. Tenda W20E V16.01.0.6(2782) /goform/telnet endpoint allows unauthenticated remote attackers to activate the Telnet daemon and obtain root shell access.
When was the CVE record for CVE-2026-67966 published?
The CVE record for CVE-2026-67966 was published on August 17, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 31, 2026; the record at its source may have been updated since.
Is CVE-2026-67966 actively exploited?
CVE-2026-67966 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67966?
CVE-2026-67966 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-67966?
No fix for CVE-2026-67966 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-67966 are linked in the Vendor Advisories panel on this page.

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