CVE-2026-77555
HIGHCVSS 7.5/10
Last modified
CVE-2026-77555 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A malicious actor with access to the network could exploit an Out-of-bounds Write vulnerability found in certain UniFi gateway devices to execute a Denial of Service (DoS) attack on the device..
Description
A malicious actor with access to the network could exploit an Out-of-bounds Write vulnerability found in certain UniFi gateway devices to execute a Denial of Service (DoS) attack on the device.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Ubiquiti Inc | Dream Machines | < 5.1.31 |
| Ubiquiti Inc | Enterprise Firewalls | < 5.1.31 |
| Ubiquiti Inc | Dream Routers | < 5.1.31 |
| Ubiquiti Inc | Cloud Gateways | < 5.1.31 |
| Ubiquiti Inc | Dream Wall | < 5.1.31 |
| Ubiquiti Inc | Express | < 4.0.21 |
| Ubiquiti Inc | Express 7 | < 5.1.31 |
| Ubiquiti Inc | UniFi Gateways | < 5.1.26 |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-77555?
A malicious actor with access to the network could exploit an Out-of-bounds Write vulnerability found in certain UniFi gateway devices to execute a Denial of Service (DoS) attack on the device.
How severe is CVE-2026-77555?
CVE-2026-77555 has a CVSS score of 7.5/10 (HIGH severity).
How do I fix CVE-2026-77555?
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-2026-77555?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST