CVE-2026-54403

HIGHPre-NVD 8.68.6—
EchelonGraph scoreHIGH 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
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.6Exploit: NoneExposed: 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(high)
EPSS
38.0%
KEV
Not listed

Published

July 2, 2026

Last Modified

July 2, 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 28× in last 7d / 28× 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. 2026-07-07 04:29 UTCEG score recompute
  2. 2026-07-07 04:29 UTCGHSA enrichment
  3. 2026-07-06 16:29 UTCEG score recompute
  4. 2026-07-06 16:29 UTCGHSA enrichment
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 16:27 UTCEPSS rescore
  7. 2026-07-06 04:29 UTCEG score recompute
  8. 2026-07-06 04:29 UTCGHSA enrichment
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-05 16:29 UTCEG score recompute
  12. 2026-07-05 16:29 UTCGHSA enrichment
  13. 2026-07-05 04:29 UTCEG score recompute
  14. 2026-07-05 04:29 UTCGHSA enrichment
  15. 2026-07-05 02:31 UTCEPSS rescore
  16. 2026-07-05 02:30 UTCEPSS rescore
  17. 2026-07-04 16:29 UTCEG score recompute
  18. 2026-07-04 16:29 UTCGHSA enrichment
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-04 04:27 UTCEG score recompute
  22. 2026-07-04 04:27 UTCGHSA enrichment
  23. 2026-07-03 16:25 UTCEG score recompute
  24. 2026-07-03 16:25 UTCGHSA enrichment
  25. 2026-07-03 04:25 UTCEG score recompute
Show 3 more
  1. 2026-07-03 04:25 UTCGHSA enrichment
  2. 2026-07-02 16:24 UTCEG score recompute
  3. 2026-07-02 16:24 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. 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 38.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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

Explore the affected products and dependency analysis for CVE-2026-54403

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