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cve recordcriticalexploited in the wild3 of 3 cataloguesexploit reported

CVE-2026-34910

Ubiquiti · UniFi OS · Ubiquiti UniFi OS Improper Input Validation Vulnerability

Published · Added to CISA KEV
CVSS10
Severitycritical
WeaknessCWE-20
EPSS45.8%98.8th percentile
Exploited3 KEV sources
Ransomware useUnknown
Federal fix dueJun 26, 2026

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

patch window

Called exploited 18 days after disclosure.

Measured from the CVE publication date to the earliest of 3 KEV catalogues that list it.

The life of this vulnerability

  1. CVE published
  2. First KEV listing18d
  3. Last KEV listing14d
  4. Last sighting2mo

Gaps are compressed to equal steps. The elapsed time is printed under each.

Which catalogues call it exploited

Sources3 of 3
Listings differ by14 d
Strongest claimconfirmed

3 catalogues list it. CIRCL aggregates the others and is shown but not counted.

Public exploitation evidence

49 public reports collected from VulnCheck and CIRCL, first on Jun 9, 2026. Each links to its original source. We have not verified them.

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.

Required action (CISA)

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.

References

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Our coverage of CVE-2026-34910

CVE-2026-50746critical

Ubiquiti Patches Critical UniFi OS Flaws Allowing Command Injection and Privilege Escalation

Ubiquiti has released security updates to address seven vulnerabilities in its UniFi OS, including a critical flaw that could allow for command injection. The most severe of these, CVE-2026-50746, carries a CVSS score of 10.0 and affects the UniFi Connect Application, versions 3.4.16 and earlier. This application is used for managing commercial building systems like smart lighting and EV chargers.

CVE-2026-20245high

Texas Parks and Wildlife, WordPress Plugin Vendor Hit by Data Breaches

The Texas Parks and Wildlife Department has confirmed a data breach affecting its hunting and fishing license system vendor, exposing personal information for over 3 million customers. Separately, ShapedPlugin, a vendor of WordPress plugins, suffered a supply chain attack that delivered malicious updates to its paid plugins.

CVE-2026-20245high

29th June – Threat Intelligence Report

A recent threat intelligence report has detailed a range of cyber incidents, from supply chain attacks and data breaches affecting major companies to the exploitation of artificial intelligence technologies for malicious purposes. The report highlights the ongoing evolution of cyber threats, emphasizing the need for robust security measures across various sectors.