CVE-2026-34908
Ubiquiti — Ubiquiti UniFi OS Improper Access Control Vulnerability
Ubiquiti · CWE-284 · in CISA KEV since 2026-06-23
EVRS 75 of 100 Urgent
Patch This Cycle
Rank 950 of 2,960 tracked
Raised to the floor for a confirmed exploited vulnerability.
Why it scores 75
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and an EPSS probability of 0.152.
- CISA KEVApplied
- RansomwareDid not apply
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyDid not apply
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
Patch or fixed version identifiedCISA required action
- community.ui.com/…/84811c09-4cf4-42ab-bd61-cc994445963b
- BOD 26-04
- Forensics Triage Requirements
- nvd.nist.gov/…/CVE-2026-34908
Fixed in
unifi os server: update to 5.0.8 or later | unifi cloud gateway industrial firmware: update to 5.1.12 or later | unifi dream machine firmware: update to 5.1.12 or later | unifi dream machine pro firmware: update to 5.1.12 or later | unifi dream machine special edition firmware: update to 5.1.12 or later | unifi dream machine pro max firmware: update to 5.1.12 or later
Affected versions
- unifi os server
< 5.0.8 - unifi cloud gateway industrial firmware
< 5.1.12 - unifi dream machine firmware
< 5.1.12 - unifi dream machine pro firmware
< 5.1.12 - unifi dream machine special edition firmware
< 5.1.12 - unifi dream machine pro max firmware
< 5.1.12 - enterprise fortress gateway firmware
< 5.1.12 - unifi dream wall firmware
< 5.1.12
+53 more affected products; see the full list at NVD.
Remediation
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.
Fixed versions from NVD.
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 10.0 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.152 (96.7th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Unknown or none | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2026-06-26 · CISA federal deadline · Overdue by 4 months | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | None known | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 10.0 (v3.1), assigned by hackerone. | Listed | ENISA EUVD |
Description
NVDA 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.
What CISA says to do