CVE-2026-54402
HIGHCVSS 8.8/10EPSS 0.79%
Last modified
CVE-2026-54402 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi OS to execute a Command Injection on the host device.. EPSS estimates a 0.79% chance of exploitation in the next 30 days.
Description
A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi OS to execute a Command Injection on the host device.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ui | Unifi Os Server | <= 5.1.15 |
| Ui | Unifi Dream Machine Firmware | <= 5.1.15 |
| Ui | Unifi Dream Machine Pro Firmware | <= 5.1.15 |
| Ui | Unifi Dream Machine Special Edition Firmware | <= 5.1.15 |
| Ui | Unifi Dream Machine Pro Max Firmware | <= 5.1.15 |
| Ui | Unifi Dream Machine Beast Firmware | <= 5.1.15 |
| Ui | Enterprise Fortress Gateway Firmware | <= 5.1.15 |
| Ui | Unifi Dream Router Firmware | <= 5.1.15 |
| Ui | Unifi Dream Wall Firmware | <= 5.1.15 |
| Ui | Unifi Dream Router 7 Firmware | <= 5.1.15 |
| Ui | Unifi Express 7 Firmware | <= 5.1.15 |
| Ui | Unifi Cloudkey Firmware | <= 5.1.15 |
| Ui | Unifi Cloud Key Plus Firmware | <= 5.1.15 |
| Ui | Unifi Cloudkey Enterprise Firmware | <= 5.1.15 |
| Ui | Unifi Network Video Recorder Firmware | <= 5.1.15 |
| Ui | Unifi Network Video Recorder Pro Firmware | <= 5.1.15 |
| Ui | Unifi Network Video Recorder Instant Firmware | <= 5.1.15 |
| Ui | Enterprise Network Video Recorder Core Firmware | <= 5.1.15 |
| Ui | Unifi Network Video Recorder G2 Firmware | <= 5.1.15 |
| Ui | Unifi Network Video Recorder G2 Pro Firmware | <= 5.1.15 |
| Ui | Unifi Cloud Gateway Ultra Firmware | <= 5.1.15 |
| Ui | Unifi Cloud Gateway Max Firmware | <= 5.1.15 |
| Ui | Unifi Cloud Gateway Industrial Firmware | <= 5.1.15 |
| Ui | Unifi Cloud Gateway Fiber Firmware | <= 5.1.15 |
| Ui | Unas 2 Firmware | <= 5.1.16 |
| Ui | Unas 4 Firmware | <= 5.1.16 |
| Ui | Unas Pro Firmware | <= 5.1.16 |
| Ui | Unas Pro 4 Firmware | <= 5.1.16 |
| Ui | Unas Pro 8 Firmware | <= 5.1.16 |
| Ui | Enterprise Firewall Core Firmware | <= 5.1.18 |
| Ui | Unifi Dream Router 5g Max Firmware | <= 5.1.15 |
| Ui | Enterprise Network Video Recorder Firmware | <= 5.1.15 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-54402?
A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi OS to execute a Command Injection on the host device.
How severe is CVE-2026-54402?
CVE-2026-54402 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.
How do I fix CVE-2026-54402?
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-2026-54402?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST