CVE-2026-51843

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-19. 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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

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

Tenda AC7 v15.03.06.44 contains a stack buffer overflow vulnerability in the /goform/AdvSetMacMtuWan interface via the wanMTU parameter.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
28.4%
KEV
Not listed

Published

June 19, 2026

Last Modified

June 22, 2026

Advisory Details (1)

Auto-updated Jun 30, 2026
No patch confirmed yet.
generic

CVE ID Request (Tenda AC7 – AdvSetMacMtuWan wanMTU Stack Overflow) – 云上KDEV

https://www.kdev.site/cve-request_008/

Vendor Advisories for CVE-2026-51843(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 83× in last 7d / 145× 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 145 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51843?
CVE-2026-51843 is a critical vulnerability published on June 19, 2026. Tenda AC7 v15.03.06.44 contains a stack buffer overflow vulnerability in the /goform/AdvSetMacMtuWan interface via the wanMTU parameter.
When was CVE-2026-51843 disclosed?
CVE-2026-51843 was first published in the National Vulnerability Database on June 19, 2026, with the most recent update on June 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51843 actively exploited?
CVE-2026-51843 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 28.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-51843?
CVE-2026-51843 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51843?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51843, 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

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