Risk Letters

Exploited vulnerability

CVE-2026-34909

TLP:CLEAR

Ubiquiti UniFi OS Path Traversal Vulnerability

Ubiquiti UniFi OS contains a path traversal vulnerability which could allow a malicious actor with access to the network to access files on the underlying system that could be manipulated to access an underlying account.

Facts

  • Vendor: Ubiquiti
  • Product: UniFi OS
  • CVSS: 10
  • EPSS (probability of exploitation within 30 days): 68 %
  • On CISA's Known Exploited Vulnerabilities list since: 23 June 2026
  • First known exploitation: 23 June 2026
  • CISA's deadline for US federal agencies: 26 June 2026
  • Weakness: CWE-22
  • First seen by Risk Letters: 22 May 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD