PT-2026-42659 · Ubiquiti · Unifi Os

Published 2026-05-22 · Updated 2026-05-23 · CVE-2026-34910

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 network-based actor can exploit improper input validation to perform command injection, which allows the execution of arbitrary commands on the system.

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

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2026-34910

Affected Products

Unifi Os

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2026-34910 · Security Note
• https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b · Note
• https://twitter.com/vuldb/status/2057981984052568477 · Twitter Post
• https://twitter.com/ADKCyber/status/2057974406845198781 · Twitter Post
• https://reddit.com/r/pwnhub/comments/1tkviat/critical_command_injection_vulnerability · Reddit Post
• https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b?notification=5e3e9a1d-963d-4f08-849b-8ef2add818e0 · Reddit Post
• https://t.me/netlas/575 · Telegram Post
• https://twitter.com/vuldb/status/2057836169820545498 · Twitter Post
• https://twitter.com/CVEnew/status/2057783187741331547 · Twitter Post
• https://twitter.com/Netlas_io/status/2058077700036657297 · Twitter Post