CVE-2026-54402

CRITICALNVD 8.89.9▲
EchelonGraph scoreMEDIUM confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-02. NVD baseline CVSS 8.8; sources differ by 1.1.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

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

A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi OS to execute a Command Injection on the host device.

CVSS v3
8.8
EG Score
9.9(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

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
Severity99% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
65%
KEV
Not listed

Published

July 2, 2026

Last Modified

July 10, 2026

Advisory Details (1)

Auto-updated Jul 9, 2026
No patch confirmed yet.
generic
https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc

Vendor Advisories for CVE-2026-54402(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 27× in last 7d / 144× 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 144 total refreshes for this CVE.

  1. 2026-07-29 08:27 UTCGHSA enrichment
  2. 2026-07-29 02:48 UTCGHSA enrichment
  3. 2026-07-28 22:38 UTCGHSA enrichment
  4. 2026-07-28 18:08 UTCEG score recompute
  5. 2026-07-28 18:08 UTCGHSA enrichment
  6. 2026-07-28 15:37 UTCEPSS rescore
  7. 2026-07-28 13:47 UTCGHSA enrichment
  8. 2026-07-28 09:23 UTCGHSA enrichment
  9. 2026-07-28 05:07 UTCGHSA enrichment
  10. 2026-07-28 00:48 UTCGHSA enrichment
  11. 2026-07-27 20:11 UTCGHSA enrichment
  12. 2026-07-27 15:53 UTCEG score recompute
  13. 2026-07-27 15:53 UTCGHSA enrichment
  14. 2026-07-27 10:15 UTCGHSA enrichment
  15. 2026-07-27 06:05 UTCGHSA enrichment
  16. 2026-07-27 01:35 UTCGHSA enrichment
  17. 2026-07-26 21:25 UTCGHSA enrichment
  18. 2026-07-26 17:15 UTCEG score recompute
  19. 2026-07-26 17:15 UTCGHSA enrichment
  20. 2026-07-26 14:54 UTCEPSS rescore
  21. 2026-07-26 13:05 UTCEG score recompute
  22. 2026-07-26 13:05 UTCGHSA enrichment
  23. 2026-07-25 14:18 UTCEPSS rescore
  24. 2026-07-24 14:18 UTCEPSS rescore
  25. 2026-07-23 14:18 UTCEPSS rescore
Show 75 more
  1. 2026-07-23 03:19 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:25 UTCEPSS rescore
  4. 2026-07-20 17:08 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 02:29 UTCEPSS rescore
  8. 2026-07-18 10:04 UTCEPSS rescore
  9. 2026-07-17 02:54 UTCGHSA enrichment
  10. 2026-07-16 22:45 UTCGHSA enrichment
  11. 2026-07-16 18:36 UTCGHSA enrichment
  12. 2026-07-16 17:03 UTCEPSS rescore
  13. 2026-07-16 14:27 UTCGHSA enrichment
  14. 2026-07-16 10:15 UTCGHSA enrichment
  15. 2026-07-16 06:06 UTCGHSA enrichment
  16. 2026-07-16 01:57 UTCGHSA enrichment
  17. 2026-07-15 21:47 UTCGHSA enrichment
  18. 2026-07-15 17:38 UTCGHSA enrichment
  19. 2026-07-15 16:57 UTCEPSS rescore
  20. 2026-07-15 16:57 UTCEPSS rescore
  21. 2026-07-15 13:29 UTCGHSA enrichment
  22. 2026-07-15 09:18 UTCGHSA enrichment
  23. 2026-07-15 05:07 UTCGHSA enrichment
  24. 2026-07-15 02:00 UTCEPSS rescore
  25. 2026-07-15 02:00 UTCEPSS rescore
  26. 2026-07-15 00:58 UTCGHSA enrichment
  27. 2026-07-14 20:48 UTCGHSA enrichment
  28. 2026-07-14 16:39 UTCGHSA enrichment
  29. 2026-07-14 12:30 UTCGHSA enrichment
  30. 2026-07-14 08:19 UTCGHSA enrichment
  31. 2026-07-14 04:09 UTCGHSA enrichment
  32. 2026-07-14 00:00 UTCGHSA enrichment
  33. 2026-07-13 22:31 UTCEPSS rescore
  34. 2026-07-13 19:50 UTCGHSA enrichment
  35. 2026-07-13 15:40 UTCGHSA enrichment
  36. 2026-07-13 11:30 UTCGHSA enrichment
  37. 2026-07-13 07:20 UTCGHSA enrichment
  38. 2026-07-13 06:13 UTCEPSS rescore
  39. 2026-07-13 06:13 UTCEPSS rescore
  40. 2026-07-13 03:07 UTCGHSA enrichment
  41. 2026-07-12 22:57 UTCGHSA enrichment
  42. 2026-07-12 18:47 UTCGHSA enrichment
  43. 2026-07-12 14:38 UTCGHSA enrichment
  44. 2026-07-12 10:29 UTCGHSA enrichment
  45. 2026-07-12 06:19 UTCGHSA enrichment
  46. 2026-07-12 05:46 UTCEPSS rescore
  47. 2026-07-12 01:58 UTCGHSA enrichment
  48. 2026-07-11 21:49 UTCGHSA enrichment
  49. 2026-07-11 17:40 UTCGHSA enrichment
  50. 2026-07-11 13:31 UTCGHSA enrichment
  51. 2026-07-11 09:21 UTCGHSA enrichment
  52. 2026-07-11 08:27 UTCEPSS rescore
  53. 2026-07-11 08:27 UTCEPSS rescore
  54. 2026-07-11 05:11 UTCGHSA enrichment
  55. 2026-07-11 01:01 UTCGHSA enrichment
  56. 2026-07-10 20:51 UTCGHSA enrichment
  57. 2026-07-10 16:42 UTCGHSA enrichment
  58. 2026-07-10 12:33 UTCGHSA enrichment
  59. 2026-07-10 08:19 UTCGHSA enrichment
  60. 2026-07-10 04:09 UTCGHSA enrichment
  61. 2026-07-10 02:56 UTCNVD updateCVSS v3 → 8.8 · severity → HIGH
  62. 2026-07-09 23:59 UTCGHSA enrichment
  63. 2026-07-09 19:49 UTCGHSA enrichment
  64. 2026-07-09 19:10 UTCEPSS rescore
  65. 2026-07-09 19:10 UTCEPSS rescore
  66. 2026-07-09 15:40 UTCGHSA enrichment
  67. 2026-07-09 11:27 UTCGHSA enrichment
  68. 2026-07-09 07:17 UTCGHSA enrichment
  69. 2026-07-09 03:08 UTCGHSA enrichment
  70. 2026-07-08 22:53 UTCGHSA enrichment
  71. 2026-07-08 18:43 UTCGHSA enrichment
  72. 2026-07-08 15:16 UTCEPSS rescore
  73. 2026-07-08 15:16 UTCEPSS rescore
  74. 2026-07-08 14:31 UTCGHSA enrichment
  75. 2026-07-08 10:21 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54402?
CVE-2026-54402 is a critical vulnerability published on July 2, 2026. A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi OS to execute a Command Injection on the host device.
When was CVE-2026-54402 disclosed?
CVE-2026-54402 was first published in the National Vulnerability Database on July 2, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54402 actively exploited?
CVE-2026-54402 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 35.4% of all scored CVEs.
What is the CVSS score of CVE-2026-54402?
CVE-2026-54402 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.9.
How do I remediate CVE-2026-54402?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54402, 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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