Ubiquiti UniFi OS Improper Access Control Vulnerability
Ubiquiti Inc — UniFi OS Server
A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS devices to make unauthorized changes to the system.
10.0
85.2%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Published
- May 22, 2026
- Modified
- Jul 23, 2026
- Added to KEV
- Jun 23, 2026
- Federal patch due
- Jun 26, 2026
CISA required action
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.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
1 foundWeaponization
Public repositories whose name or description references CVE-2026-34908, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
References
How this class of flaw gets exploited
Frequently asked questions
What is CVE-2026-34908?
A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS devices to make unauthorized changes to the system.
How severe is CVE-2026-34908?
CVE-2026-34908 has a CVSS base score of 10.0 out of 10 (CVSS 3.1).
Is CVE-2026-34908 actively exploited in the wild?
Yes. CVE-2026-34908 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jun 23, 2026, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2026-34908?
85.2% - meaning FIRST.org's EPSS model estimates a 85.2% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2026-34908?
Yes - a public Nuclei template referencing CVE-2026-34908 exist in public repositories we checked. We also found 1 public GitHub repositories referencing this CVE.
What type of vulnerability is CVE-2026-34908?
CVE-2026-34908 is classified under CWE-284 (CWE-284 Improper Access Control - Generic).
Cross-checked against
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