CVE-2026-34910
Ubiquiti — Ubiquiti UniFi OS Improper Input Validation Vulnerability
Ubiquiti · CWE-20 — Improper input validation · in CISA KEV since 2026-06-23
EVRS 76 of 100 Urgent
Patch This Cycle
Rank 686 of 2,960 tracked
Why it scores 76
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and an EPSS probability of 0.458.
- 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-2026-34910
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. | 0.458 (98.8th 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 Input Validation vulnerability found in UniFi OS devices to execute a Command Injection.
What CISA says to do