CVE-2026-55110
MEDIUMCVSS 6.1/10EPSS 0.18%
Last modified
CVE-2026-55110 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A malicious actor who lures an authenticated user to a malicious page could exploit a Cross-Origin Resource Sharing (CORS) misconfiguration found in UniFi OS to trigger actions in UniFi OS using that user's session.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
Description
A malicious actor who lures an authenticated user to a malicious page could exploit a Cross-Origin Resource Sharing (CORS) misconfiguration found in UniFi OS to trigger actions in UniFi OS using that user's session.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ui | Unifi Os Server | <= 5.1.15 |
| Ui | Unifi Dream Machine Beast 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 | 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 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 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-55110?
A malicious actor who lures an authenticated user to a malicious page could exploit a Cross-Origin Resource Sharing (CORS) misconfiguration found in UniFi OS to trigger actions in UniFi OS using that user's session.
How severe is CVE-2026-55110?
CVE-2026-55110 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-55110?
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-2026-55110?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST