CVE-2026-36778

MEDIUMPre-NVD 4.94.9—
EchelonGraph scoreHIGH confidence

Score 4.9 from GitHub Security Advisory published 2026-06-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
4.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.9Exploit: 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 O3 Wireless Router v1.0.0.5(4180) was discovered to contain a stack overflow in the username parameter of the R7WebsSecurityHandler function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

CVSS v3
4.9
EG Score
4.9(high)
EPSS
29.0%
KEV
Not listed

Published

June 9, 2026

Last Modified

June 10, 2026

Advisory Details (1)

Auto-updated Jun 14, 2026
No patch confirmed yet.
generic

SemVulLLM/O3/R7WebsSecurityHandler at main · xhh0124/SemVulLLM · GitHub

https://github.com/xhh0124/SemVulLLM/tree/main/O3/R7WebsSecurityHandler

Vendor Advisories for CVE-2026-36778(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 18× in last 7d / 81× 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.

  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 15:10 UTCEG score recompute
  6. 2026-07-05 15:10 UTCGHSA enrichment
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-04 13:15 UTCEG score recompute
  9. 2026-07-04 13:15 UTCGHSA enrichment
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-03 00:54 UTCEG score recompute
  12. 2026-07-03 00:53 UTCGHSA enrichment
  13. 2026-07-01 22:52 UTCEG score recompute
  14. 2026-07-01 22:51 UTCGHSA enrichment
  15. 2026-07-01 15:06 UTCEPSS rescore
  16. 2026-06-30 23:22 UTCEPSS rescore
  17. 2026-06-30 20:54 UTCEG score recompute
  18. 2026-06-30 20:54 UTCGHSA enrichment
  19. 2026-06-29 19:18 UTCEG score recompute
  20. 2026-06-29 19:18 UTCGHSA enrichment
  21. 2026-06-28 17:41 UTCEG score recompute
  22. 2026-06-28 17:41 UTCGHSA enrichment
  23. 2026-06-28 14:07 UTCEPSS rescore
  24. 2026-06-28 04:56 UTCEPSS rescore
  25. 2026-06-27 16:04 UTCEG score recompute
Show 56 more
  1. 2026-06-27 16:04 UTCGHSA enrichment
  2. 2026-06-27 03:08 UTCEPSS rescore
  3. 2026-06-26 14:26 UTCEG score recompute
  4. 2026-06-26 14:26 UTCGHSA enrichment
  5. 2026-06-25 13:49 UTCEPSS rescore
  6. 2026-06-25 13:49 UTCEPSS rescore
  7. 2026-06-25 12:49 UTCEG score recompute
  8. 2026-06-25 12:49 UTCGHSA enrichment
  9. 2026-06-24 14:05 UTCEPSS rescore
  10. 2026-06-24 11:13 UTCEG score recompute
  11. 2026-06-24 11:12 UTCGHSA enrichment
  12. 2026-06-23 21:33 UTCEPSS rescore
  13. 2026-06-23 21:33 UTCEPSS rescore
  14. 2026-06-23 09:34 UTCEG score recompute
  15. 2026-06-23 09:34 UTCGHSA enrichment
  16. 2026-06-22 14:25 UTCEPSS rescore
  17. 2026-06-22 14:25 UTCEPSS rescore
  18. 2026-06-22 04:48 UTCEG score recompute
  19. 2026-06-22 04:48 UTCGHSA enrichment
  20. 2026-06-21 14:56 UTCEPSS rescore
  21. 2026-06-21 14:56 UTCEPSS rescore
  22. 2026-06-21 01:59 UTCEPSS rescore
  23. 2026-06-21 01:40 UTCEG score recompute
  24. 2026-06-21 01:40 UTCGHSA enrichment
  25. 2026-06-20 00:03 UTCEG score recompute
  26. 2026-06-20 00:03 UTCGHSA enrichment
  27. 2026-06-19 19:25 UTCEPSS rescore
  28. 2026-06-19 19:25 UTCEPSS rescore
  29. 2026-06-18 22:26 UTCEG score recompute
  30. 2026-06-18 22:25 UTCGHSA enrichment
  31. 2026-06-18 17:52 UTCEPSS rescore
  32. 2026-06-18 17:52 UTCEPSS rescore
  33. 2026-06-17 20:46 UTCEG score recompute
  34. 2026-06-17 20:46 UTCGHSA enrichment
  35. 2026-06-17 17:53 UTCEPSS rescore
  36. 2026-06-16 19:10 UTCEG score recompute
  37. 2026-06-16 19:10 UTCGHSA enrichment
  38. 2026-06-16 17:52 UTCEPSS rescore
  39. 2026-06-15 17:49 UTCEPSS rescore
  40. 2026-06-15 17:33 UTCEG score recompute
  41. 2026-06-15 17:33 UTCGHSA enrichment
  42. 2026-06-14 23:18 UTCEPSS rescore
  43. 2026-06-14 15:40 UTCEG score recompute
  44. 2026-06-14 15:40 UTCGHSA enrichment
  45. 2026-06-13 23:00 UTCEPSS rescore
  46. 2026-06-13 14:04 UTCEG score recompute
  47. 2026-06-13 14:04 UTCGHSA enrichment
  48. 2026-06-12 23:12 UTCEPSS rescore
  49. 2026-06-12 23:12 UTCEPSS rescore
  50. 2026-06-12 12:27 UTCEG score recompute▲ 4.90
  51. 2026-06-12 12:27 UTCGHSA enrichment
  52. 2026-06-11 14:00 UTCEPSS rescore
  53. 2026-06-10 22:18 UTCEPSS rescore
  54. 2026-06-10 19:18 UTCNVD updateCVSS v3 → 4.9 · severity → MEDIUM
  55. 2026-06-09 19:22 UTCEG score recompute
  56. 2026-06-09 19:21 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-36778?
CVE-2026-36778 is a medium vulnerability published on June 9, 2026. Shenzhen Tenda Technology Co., Ltd Tenda O3 Wireless Router v1.0.0.5(4180) was discovered to contain a stack overflow in the username parameter of the R7WebsSecurityHandler function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
When was CVE-2026-36778 disclosed?
CVE-2026-36778 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on June 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-36778 actively exploited?
CVE-2026-36778 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-36778?
CVE-2026-36778 has a CVSS v3.1 base score of 4.9 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-36778?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-36778, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-36778

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