CVE-2026-34909
Ubiquiti UniFi OS Path Traversal Vulnerability
- Published
- May 22, 2026
- Updated
- Jun 24, 2026
- Assigning CNA
- hackerone
- Evidence observed
- Jun 23, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.2%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to access an underlying account.
Sources
2Proof-of-concept exploit for UniFi OS CVE-2026-34910 auth bypass enabling command injection/RCE, and CVE-2026-34909 path traversal for arbitrary file reads.
- CVE-2026-34908-checkScanner
Safely detect whether a UniFi OS Server is vulnerable to CVE-2026-34908
Responsible use
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