CVE-2026-34910

Deferred
Published: 22 May 2026, 00:43
Last modified:24 Jun 2026, 03:55

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
10 CRITICAL
v3.1 (cve.org)
EPSS Score
81.84% CRITICAL
82% probability +48.22%
KEV
Listed
CISA
1 listing
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 May 2026, 00:43
Published
Vulnerability first disclosed
23 Jun 2026, 00:00
Added to CISA KEV
Ubiquiti UniFi OS Improper Input Validation Vulnerability
24 Jun 2026, 03:55
Last Modified
Vulnerability information updated
26 Jun 2026, 00:00
CISA Remediation Due
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

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.

CVSS Metrics

  • v3.1•CRITICAL•Score: 10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 81.84%• Percentile: 100%

Techniques & Countermeasures

  • CWE-20•Improper Input Validation

    The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected Systems

  • ubiquiti inc•efg

    < 5.1.12

  • ubiquiti inc•envr

    < 5.1.12

  • ubiquiti inc•envr-core

    < 5.1.12

  • ubiquiti inc•express 7

    < 5.1.12

  • ubiquiti inc•ucg-fiber

    < 5.1.12

  • ubiquiti inc•ucg-industrial

    < 5.1.12

  • ubiquiti inc•ucg-max

    < 5.1.12

  • ubiquiti inc•ucg-ultra

    < 5.1.12

  • ubiquiti inc•uck

    < 5.1.12

  • ubiquiti inc•uck-enterprise

    < 5.1.12

  • ubiquiti inc•uckp

    < 5.1.12

  • ubiquiti inc•udm

    < 5.1.12

  • ubiquiti inc•udm-beast

    < 5.1.11

  • ubiquiti inc•udm-pro

    < 5.1.12

  • ubiquiti inc•udm-pro-max

    < 5.1.12

  • ubiquiti inc•udm-se

    < 5.1.12

  • ubiquiti inc•udr

    < 5.1.12

  • ubiquiti inc•udr-5g

    < 5.1.12

  • ubiquiti inc•udr7

    < 5.1.12

  • ubiquiti inc•udw

    < 5.1.12

  • ubiquiti inc•unas-2

    < 5.1.10

  • ubiquiti inc•unas-4

    < 5.1.10

  • ubiquiti inc•unas-pro

    < 5.1.10

  • ubiquiti inc•unas-pro-4

    < 5.1.10

  • ubiquiti inc•unas-pro-8

    < 5.1.10

  • ubiquiti inc•unifi os server

    < 5.0.8

  • ubiquiti inc•unvr

    < 5.1.12

  • ubiquiti inc•unvr-g2

    < 5.1.12

  • ubiquiti inc•unvr-g2-pro

    < 5.1.12

  • ubiquiti inc•unvr-instant

    < 5.1.12

  • ubiquiti inc•unvr-pro

    < 5.1.12

References (3)