PT-2026-42657 · Ubiquiti · Unifi Os

Published 2026-05-22 · Updated 2026-05-22 · CVE-2026-34908

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions UniFi OS (affected versions not specified)

Description A malicious actor with network access can exploit improper access control to make unauthorized changes to the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2026-34908

Affected Products

Unifi Os

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-34908 · Security Note
• https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b · Note
• https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b?notification=5e3e9a1d-963d-4f08-849b-8ef2add818e0 · Reddit Post
• https://twitter.com/CVEnew/status/2057783188760515065 · Twitter Post