CVE-2026-54403

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-07-02. a secondary CVSS source baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.6Exploit: 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 could exploit a Path Traversal vulnerability found in certain devices running UniFi OS to bypass authentication of such UniFi OS devices or instances.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity86% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
54%
KEV
Not listed

Published

July 2, 2026

Last Modified

July 10, 2026

Advisory Details (1)

Auto-updated Jul 3, 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-2026-54403(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 9× in last 7d / 71× 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 208 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54403?
CVE-2026-54403 is a high vulnerability published on July 2, 2026. A malicious actor with access to the network could exploit a Path Traversal vulnerability found in certain devices running UniFi OS to bypass authentication of such UniFi OS devices or instances.
When was CVE-2026-54403 disclosed?
CVE-2026-54403 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-2026-54403 actively exploited?
CVE-2026-54403 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 46.3% of all scored CVEs.
What is the CVSS score of CVE-2026-54403?
CVE-2026-54403 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-54403?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54403, 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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