CVE-2026-67822

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-31. 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 a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

Tenda W6-S 1.0.0.4(510) contains a stack-based buffer overflow vulnerability in the /goform/wifiSSIDset endpoint. The function formwrlSSIDset uses sprintf to copy user-controlled 'GO' and 'index' parameters into a 64-byte stack buffer without length restriction, leading to stack overflow.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
75(Attend)
EG Risk 75/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

July 31, 2026

Last Modified

July 31, 2026

Advisory Details (1)

Auto-updated Aug 14, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Tenda/Tenda_W6-S_GO_overflow.md at main · Tristerjh/Tenda · GitHub

https://github.com/Tristerjh/Tenda/blob/main/Tenda_W6-S_GO_overflow.md

Vendor Advisories for CVE-2026-67822(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 / 162× 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 162 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67822?
CVE-2026-67822 is a critical vulnerability published on July 31, 2026. Tenda W6-S 1.0.0.4(510) contains a stack-based buffer overflow vulnerability in the /goform/wifiSSIDset endpoint. The function formwrlSSIDset uses sprintf to copy user-controlled 'GO' and 'index' parameters into a 64-byte stack buffer without length restriction, leading to stack overflow.
When was CVE-2026-67822 disclosed?
CVE-2026-67822 was first published in the National Vulnerability Database on July 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67822 actively exploited?
CVE-2026-67822 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 77.9% of all scored CVEs.
What is the CVSS score of CVE-2026-67822?
CVE-2026-67822 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-67822?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67822, 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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