CVE-2026-54403A malicious actor with access to the network could exploit a Path Traversal vulnerability found in certain devices running UniFi OS to…
- 8.6HighCVSS base score
- 0.77%Exploitation in 30 daysEPSS · top 44% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By hackerone
- 19 days later
· 19 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| hackeroneCNA (assigner) | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |
| NVDNVD · Analyzed | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.77% · top 44% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.6.
Affected products
Ubiquiti Inc · UniFi OS Server
- affected < 5.1.19
- affected < 5.1.19
Ubiquiti Inc · Enterprise Fortress Gateway
- affected < 5.1.19
- affected < 5.1.19
- affected < 5.1.19
- affected < 5.1.19
- affected < 5.1.19
Ubiquiti Inc · Network Video Recorders
- affected < 5.1.19
Ubiquiti Inc · Enterprise Video Recorders
- affected < 5.1.19
- affected < 5.1.19
Ubiquiti Inc · Network Attached Storage
- affected < 5.1.19
Ubiquiti Inc · Enterprise Firewall Core
- affected < 5.1.19
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-41381 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-54403)Record last updated .