CVE-2026-34908
Ubiquiti UniFi OS Improper Access Control Vulnerability
Exploited in the wild
This vulnerability is on the CISA Known Exploited Vulnerabilities list, added 2026-06-23. Federal due date: 2026-06-26.
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.
Impact
Ubiquiti UniFi OS contains an improper access control vulnerability which could allow a malicious actor with access to the network to make unauthorized changes to the system.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Ui | Unifi Os Server | before 5.0.8 |
| Ui | Unifi Cloud Gateway Industrial Firmware | before 5.1.12 |
| Ui | Unifi Dream Machine Firmware | before 5.1.12 |
| Ui | Unifi Dream Machine Pro Firmware | before 5.1.12 |
| Ui | Unifi Dream Machine Special Edition Firmware | before 5.1.12 |
| Ui | Unifi Dream Machine Pro Max Firmware | before 5.1.12 |
| Ui | Enterprise Fortress Gateway Firmware | before 5.1.12 |
| Ui | Unifi Dream Wall Firmware | before 5.1.12 |
| Ui | Unifi Dream Router Firmware | before 5.1.12 |
| Ui | Unifi Dream Router 7 Firmware | before 5.1.12 |
| Ui | Unifi Express 7 Firmware | before 5.1.12 |
| Ui | Unifi Network Video Recorder Firmware | before 5.1.12 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34908
- https://www.pwndefend.com/2026/06/09/cve-2026-34910-exploitation-itw-building-a-botnet-mirai/