PT-2026-42658 · Ubiquiti · Unifi Os

Published 2026-05-21 · Updated 2026-07-01 · CVE-2026-34909

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 Path Traversal issue exists in UniFi OS devices due to improper restriction of directory path names. A remote actor with network access can exploit this to access files on the underlying system, which may be further manipulated to gain unauthorized access to an underlying account.

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

Exploit

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

BDU:2026-07799

CVE-2026-34909

Affected Products

Unifi Os

References · 42

• 🔥 https://pwndefend.com/2026/06/09/cve-2026-34910-exploitation-itw-building-a-botnet-mirai · Exploit
• https://bdu.fstec.ru/vul/2026-07799 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34909 · Security Note
• https://twitter.com/DFIR_Radar/status/2064075623887245361 · Twitter Post
• https://twitter.com/vuln_tracker/status/2064245739434491987 · Twitter Post
• https://twitter.com/integ_sec/status/2064008671705653712 · Twitter Post
• https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b · Security Note, Vendor Advisory
• https://twitter.com/f1tym1/status/2064118958542700562 · Twitter Post
• https://twitter.com/Netlas_io/status/2058077700036657297 · Twitter Post
• https://t.me/cveNotify/173293 · Telegram Post
• https://reddit.com/r/Ubiquiti/comments/1ueftvq/cisa_warns_of_max_severity_ubiquiti_flaws · Reddit Post
• https://twitter.com/seoscottsdale/status/2072386832617402728 · Twitter Post
• https://t.me/netlas/575 · Telegram Post
• https://cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv · Note
• https://t.me/cveNotify/173497 · Telegram Post