CVE-2026-34909
CRITICALCVSS 10/10Actively ExploitedEPSS 2.27%
Last modified
CVE-2026-34909 is a critical-severity vulnerability rated 10/10 on the CVSS scale. A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to access an underlying account.. CISA has confirmed active exploitation in the wild. EPSS estimates a 2.27% chance of exploitation in the next 30 days.
Description
A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to access an underlying account.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ui | Unifi Os Server | < 5.0.8 |
| Ui | Unifi Cloud Gateway Industrial Firmware | < 5.1.12 |
| Ui | Unifi Dream Machine Firmware | < 5.1.12 |
| Ui | Unifi Dream Machine Pro Firmware | < 5.1.12 |
| Ui | Unifi Dream Machine Special Edition Firmware | < 5.1.12 |
| Ui | Unifi Dream Machine Pro Max Firmware | < 5.1.12 |
| Ui | Enterprise Fortress Gateway Firmware | < 5.1.12 |
| Ui | Unifi Dream Wall Firmware | < 5.1.12 |
| Ui | Unifi Dream Router Firmware | < 5.1.12 |
| Ui | Unifi Dream Router 7 Firmware | < 5.1.12 |
| Ui | Unifi Express 7 Firmware | < 5.1.12 |
| Ui | Unifi Network Video Recorder Firmware | < 5.1.12 |
| Ui | Unifi Network Video Recorder Pro Firmware | < 5.1.12 |
| Ui | Unifi Network Video Recorder Instant Firmware | < 5.1.12 |
| Ui | Enterprise Network Video Recorder Firmware | < 5.1.12 |
| Ui | Unifi Cloud Gateway Ultra Firmware | < 5.1.12 |
| Ui | Unifi Cloud Gateway Max Firmware | < 5.1.12 |
| Ui | Unifi Cloud Gateway Fiber Firmware | < 5.1.12 |
| Ui | Unifi Dream Router 5g Max Firmware | < 5.1.12 |
| Ui | Enterprise Network Video Recorder Core Firmware | < 5.1.12 |
| Ui | Unifi Cloud Key Plus Firmware | < 5.1.12 |
| Ui | Unifi Cloudkey Firmware | < 5.1.12 |
| Ui | Unifi Cloudkey Enterprise Firmware | < 5.1.12 |
| Ui | Unifi Network Video Recorder G2 Firmware | < 5.1.12 |
| Ui | Unifi Network Video Recorder G2 Pro Firmware | < 5.1.12 |
| Ui | Unifi Dream Machine Beast Firmware | < 5.1.11 |
| Ui | Unas 2 Firmware | < 5.1.10 |
| Ui | Unas 4 Firmware | < 5.1.10 |
| Ui | Unas Pro Firmware | < 5.1.10 |
| Ui | Unas Pro 4 Firmware | < 5.1.10 |
| Ui | Unas Pro 8 Firmware | < 5.1.10 |
| Ui | Unifi Express Firmware | < 4.0.14 |
References
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34909US Government Resource
- https://www.pwndefend.com/2026/06/09/cve-2026-34910-exploitation-itw-building-a-botnet-mirai/Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-34909?
A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to access an underlying account.
How severe is CVE-2026-34909?
CVE-2026-34909 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 2.27% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2026-34909?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-34909?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST