Description
A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection.
Published: 2026-05-22
Score: 10 Critical
EPSS: 18.1% Moderate
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability is an Improper Input Validation flaw in UniFi OS devices that allows a malicious actor who has access to the local network to supply crafted input to the device and cause it to execute arbitrary operating‑system commands with device privileges. This flaw permits the device to run commands supplied by an attacker, leading to full compromise of the affected device.

Affected Systems

Affected products include Ubiquiti Inc EFG, Ubiquiti Inc ENVR, Ubiquiti Inc ENVR‑Core, Ubiquiti Inc Express 7, Ubiquiti Inc UCG‑Fiber, Ubiquiti Inc UCG‑Industrial, Ubiquiti Inc UCG‑Max, Ubiquiti Inc UCG‑Ultra, Ubiquiti Inc UCK, Ubiquiti Inc UCK‑Enterprise, Ubiquiti Inc UCKP, Ubiquiti Inc UDM, Ubiquiti Inc UDM‑Beast, Ubiquiti Inc UDM‑Pro, Ubiquiti Inc UDM‑Pro‑Max, Ubiquiti Inc UDM‑SE, Ubiquiti Inc UDR, Ubiquiti Inc UDR‑5G, Ubiquiti Inc UDR7, Ubiquiti Inc UDW, Ubiquiti Inc UNAS‑2, Ubiquiti Inc UNAS‑4, Ubiquiti Inc UNAS‑Pro, Ubiquiti Inc UNAS‑Pro‑4, Ubiquiti Inc UNAS‑Pro‑8, Ubiquiti Inc UNVR, Ubiquiti Inc UNVR‑G2, Ubiquiti Inc UNVR‑G2‑Pro, Ubiquiti Inc UNVR‑Instant, Ubiquiti Inc UNVR‑Pro, and Ubiquiti Inc UniFi OS Server. No specific version information is reported.

Risk and Exploitability

The flaw has a CVSS score of 10, indicating maximum severity. The EPSS score is 18%, suggesting a moderate probability of exploitation; it is not listed in the CISA KEV catalog. The description indicates that the attacker must have network access to reach the affected input handling code; this is the likely attack vector. Because the flaw allows arbitrary command execution, exploitation would enable an attacker to take complete control of a device if the attacker can reach it.

Generated by OpenCVE AI on June 10, 2026 at 14:42 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the official firmware patch released by Ubiquiti for all affected UniFi OS devices.
  • Restrict management traffic to the devices to a trusted subnet or isolated network segment and disable unused management interfaces.
  • Enforce network segmentation and firewall rules so that only authorized IP ranges can reach the device’s internal management interfaces.

Generated by OpenCVE AI on June 10, 2026 at 14:42 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 10 Jun 2026 15:00:00 +0000

Type Values Removed Values Added
Title Command Injection Vulnerability in UniFi OS Devices

Fri, 22 May 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 22 May 2026 13:15:00 +0000

Type Values Removed Values Added
First Time appeared Ubiquiti
Ubiquiti efg
Ubiquiti envr
Ubiquiti envr-core
Ubiquiti express 7
Ubiquiti ucg-fiber
Ubiquiti ucg-industrial
Ubiquiti ucg-max
Ubiquiti ucg-ultra
Ubiquiti uck
Ubiquiti uck-enterprise
Ubiquiti uckp
Ubiquiti udm
Ubiquiti udm-beast
Ubiquiti udm-pro
Ubiquiti udm-pro-max
Ubiquiti udm-se
Ubiquiti udr
Ubiquiti udr-5g
Ubiquiti udr7
Ubiquiti udw
Ubiquiti unas-2
Ubiquiti unas-4
Ubiquiti unas-pro
Ubiquiti unas-pro-4
Ubiquiti unas-pro-8
Ubiquiti unifi Os
Ubiquiti unvr
Ubiquiti unvr-g2
Ubiquiti unvr-g2-pro
Ubiquiti unvr-instant
Ubiquiti unvr-pro
Vendors & Products Ubiquiti
Ubiquiti efg
Ubiquiti envr
Ubiquiti envr-core
Ubiquiti express 7
Ubiquiti ucg-fiber
Ubiquiti ucg-industrial
Ubiquiti ucg-max
Ubiquiti ucg-ultra
Ubiquiti uck
Ubiquiti uck-enterprise
Ubiquiti uckp
Ubiquiti udm
Ubiquiti udm-beast
Ubiquiti udm-pro
Ubiquiti udm-pro-max
Ubiquiti udm-se
Ubiquiti udr
Ubiquiti udr-5g
Ubiquiti udr7
Ubiquiti udw
Ubiquiti unas-2
Ubiquiti unas-4
Ubiquiti unas-pro
Ubiquiti unas-pro-4
Ubiquiti unas-pro-8
Ubiquiti unifi Os
Ubiquiti unvr
Ubiquiti unvr-g2
Ubiquiti unvr-g2-pro
Ubiquiti unvr-instant
Ubiquiti unvr-pro

Fri, 22 May 2026 04:45:00 +0000

Type Values Removed Values Added
Title Command Injection Vulnerability in UniFi OS Devices

Fri, 22 May 2026 01:30:00 +0000

Type Values Removed Values Added
Description A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection.
Weaknesses CWE-20
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}

Subscriptions

Ubiquiti Efg Envr Envr-core Express 7 Ucg-fiber Ucg-industrial Ucg-max Ucg-ultra Uck Uck-enterprise Uckp Udm Udm-beast Udm-pro Udm-pro-max Udm-se Udr Udr-5g Udr7 Udw Unas-2 Unas-4 Unas-pro Unas-pro-4 Unas-pro-8 Unifi Os Unvr Unvr-g2 Unvr-g2-pro Unvr-instant Unvr-pro
cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2026-05-23T03:55:51.245Z

Reserved: 2026-03-31T15:00:06.521Z

Link: CVE-2026-34910

cve-icon Vulnrichment

Updated: 2026-05-22T12:50:29.057Z

cve-icon NVD

Status : Deferred

Published: 2026-05-22T02:16:34.527

Modified: 2026-05-22T16:22:31.900

Link: CVE-2026-34910

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-10T14:45:32Z

Weaknesses
  • CWE-20

    Improper Input Validation