CVE-2026-36821

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
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.

Shenzhen Tenda Technology Co., Ltd Tenda W20E v15.11.0.6 was discovered to contain a buffer overflow in the picCropName parameter of the formCropAndSetWewifiPic function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
22.7%
KEV
Not listed

Published

June 9, 2026

Last Modified

June 9, 2026

Advisory Details (1)

Auto-updated Jun 9, 2026
No patch confirmed yet.
generic

SemVulLLM/W20E/formCropAndSetWewifiPic at main · xhh0124/SemVulLLM · GitHub

https://github.com/xhh0124/SemVulLLM/tree/main/W20E/formCropAndSetWewifiPic

Vendor Advisories for CVE-2026-36821(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 32× in last 7d / 132× 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 132 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-36821?
CVE-2026-36821 is a high vulnerability published on June 9, 2026. Shenzhen Tenda Technology Co., Ltd Tenda W20E v15.11.0.6 was discovered to contain a buffer overflow in the picCropName parameter of the formCropAndSetWewifiPic function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
When was CVE-2026-36821 disclosed?
CVE-2026-36821 was first published in the National Vulnerability Database on June 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-36821 actively exploited?
CVE-2026-36821 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 22.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-36821?
CVE-2026-36821 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-36821?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-36821, 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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