PT-2026-42656 · Ubiquiti · Unifi Os

Published 2026-05-21 · Updated 2026-06-24 · CVE-2026-33000

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:H/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 An improper input validation issue in UniFi OS allows a malicious actor with network access and high privileges to execute a command injection. Approximately 100,000 UniFi endpoints are reported as internet-exposed.

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

BDU:2026-07802

CVE-2026-33000

Affected Products

Unifi Os

References · 13

• https://nvd.nist.gov/vuln/detail/CVE-2026-33000 · Security Note
• https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07802 · Security Note
• https://t.me/CVEtracker/54580 · Telegram Post
• https://t.me/cveNotify/164491 · Telegram Post
• https://twitter.com/ElusivePrivacy/status/2057981219447493071 · Twitter Post
• https://twitter.com/CCBalert/status/2059301204908208556 · Twitter Post
• https://twitter.com/ToolsLib/status/2057874639586537891 · Twitter Post
• https://t.me/true_secator/8245 · Telegram Post
• https://t.me/cveNotify/173842 · Telegram Post
• https://twitter.com/CVEnew/status/2057783186726252783 · Twitter 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://reddit.com/r/Network/comments/1tnvomo/threat_intel_may_22_2026_vulnerability · Reddit Post