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CVE-2026-34908

A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS devices to make unauthorized changes to the system.

Scores

10.0
CVSS 10.0 out of 10, critical severity.
15.2%
EPSS 15.2% chance of exploitation in the next 30 days.

The facts

Published
22 May 2026
Last changed
23 July 2026
NVD status
Analyzed
Severity
Critical, CVSS 10.0 out of 10 (version 3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
Affects
  • ui unifi os server
  • ui unifi cloud gateway industrial firmware
  • ui unifi dream machine firmware
  • ui unifi dream machine pro firmware
  • ui unifi dream machine special edition firmware
Known exploited
Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 23 June 2026.
EPSS
15.2% chance of exploitation activity in the next 30 days (percentile 97).

Is there a Securelyn advisory?

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References