CVE-2026-51380

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-15. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
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: 0.7%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.

Buffer Overflow vulnerability in Tenda AC10 v3 (firmware V03.03.16.09) allows attackers to cause a permanent Denial of Service (DoS) or potentially execute remote code via the /cgi-bin/UploadCfg endpoint

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
0.7%
EPSS %ILE
52nd
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

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 15, 2026

Last Modified

July 16, 2026

Advisory Details (3)

Auto-updated Oct 10, 2026
No fix on record yet.
Web page

GitHub - snyi001/Tenda-AC10-v3: Buffer Overflow vulnerability in Tenda AC10 v3 (firmware V03.03.16.09) allows attackers to cause a permanent Denial of Service (DoS) or potentially execute remote code via the /cgi-bin/UploadCfg endpoint · GitHub

https://github.com/snyi001/Tenda-AC10-v3
Web page

AC10 v3.0 Firmware - Tenda Global(English)

https://www.tendacn.com/material/show/104968
Web page

CV/11.zip at main · snyi001/CV · GitHub

https://github.com/snyi001/CV/blob/main/11.zip

Vendor Advisories for CVE-2026-51380(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 16× in last 7d / 47× 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 364 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 264 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 09:10 UTCEG score recompute
  2. 2026-10-14 09:10 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  4. 2026-10-13 06:12 UTCEG score recompute
  5. 2026-10-13 06:12 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  7. 2026-10-12 15:58 UTCEG score recompute
  8. 2026-10-12 07:13 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-11 19:42 UTCEG score recompute
  10. 2026-10-11 16:56 UTCEG score recompute
  11. 2026-10-11 14:20 UTCEG score recompute
  12. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  13. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  14. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  15. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  16. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  17. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  19. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  21. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  23. 2026-10-01 12:45 UTCEG score recompute
  24. 2026-10-01 12:45 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 51st percentile
Show 75 more
  1. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  2. 2026-09-28 13:15 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-09-28 08:49 UTCEG score recompute
  4. 2026-09-28 08:49 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  6. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  7. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  8. 2026-09-24 13:20 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-09-24 08:55 UTCEG score recompute
  10. 2026-09-24 08:55 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  12. 2026-09-23 11:08 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  13. 2026-09-23 07:14 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-09-23 03:24 UTCEG score recompute
  15. 2026-09-23 03:24 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  17. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  18. 2026-09-18 09:59 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-09-18 04:48 UTCEG score recompute
  20. 2026-09-18 04:48 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  22. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  23. 2026-09-14 10:56 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-09-14 06:57 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-09-14 03:04 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  26. 2026-09-13 23:14 UTCEG score recompute
  27. 2026-09-13 23:14 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  28. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  29. 2026-09-13 16:25 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  30. 2026-09-13 11:49 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  31. 2026-09-13 07:27 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  32. 2026-09-12 16:56 UTCEG score recompute
  33. 2026-09-12 16:56 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  34. 2026-09-12 13:05 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  35. 2026-09-12 07:26 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  36. 2026-09-12 01:41 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  37. 2026-09-11 21:50 UTCEG score recompute
  38. 2026-09-11 21:50 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  39. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  40. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  41. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  42. 2026-09-08 00:59 UTCEG score recompute
  43. 2026-09-08 00:59 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  44. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  45. 2026-09-06 17:44 UTCEG score recompute
  46. 2026-09-06 17:44 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  47. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  48. 2026-09-06 13:30 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  49. 2026-09-06 04:35 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  50. 2026-09-06 00:44 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  51. 2026-09-05 20:54 UTCEG score recompute
  52. 2026-09-05 20:54 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  53. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  54. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  55. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  56. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  57. 2026-08-31 04:34 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  58. 2026-08-31 00:32 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  59. 2026-08-30 20:41 UTCEG score recompute
  60. 2026-08-30 20:41 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  61. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  62. 2026-08-30 16:51 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  63. 2026-08-30 13:00 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  64. 2026-08-30 07:58 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  65. 2026-08-30 03:58 UTCEG score recompute
  66. 2026-08-30 03:58 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  67. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  68. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  69. 2026-08-28 01:53 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  70. 2026-08-27 21:28 UTCEG score recompute
  71. 2026-08-27 21:28 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  72. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  73. 2026-08-27 12:47 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  74. 2026-08-27 03:07 UTCGHSA enrichmentGHSA-4fjw-jq8h-7h3f · GitHub severity CRITICAL · GitHub CVSS 9.8
  75. 2026-08-26 23:13 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51380?
CVE-2026-51380 is a critical-severity vulnerability; its CVE record was published on July 15, 2026. Buffer Overflow vulnerability in Tenda AC10 v3 (firmware V03.03.16.09) allows attackers to cause a permanent Denial of Service (DoS) or potentially execute remote code via the /cgi-bin/UploadCfg endpoint
When was the CVE record for CVE-2026-51380 published?
The CVE record for CVE-2026-51380 was published on July 15, 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 July 16, 2026; the record at its source may have been updated since.
Is CVE-2026-51380 actively exploited?
CVE-2026-51380 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (52nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-51380?
CVE-2026-51380 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51380?
No fix for CVE-2026-51380 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-2026-51380 are linked in the Vendor Advisories panel on this page.

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