Vulnerability details
CVE-2026-77555
Ubiquiti Cloud GatewaysUbiquiti Dream MachinesUbiquiti Dream RoutersUbiquiti Dream WallUbiquiti Enterprise FirewallsUbiquiti Express
CVSS 3.1
7.5High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (Ubiquiti) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Ubiquiti Inc | Cloud Gateways | v < 5.1.31 | CVEProject cvelistV5 (CNA) |
| Ubiquiti Inc | Dream Machines | v < 5.1.31 | CVEProject cvelistV5 (CNA) |
| Ubiquiti Inc | Dream Routers | v < 5.1.31 | CVEProject cvelistV5 (CNA) |
| Ubiquiti Inc | Dream Wall | v < 5.1.31 | CVEProject cvelistV5 (CNA) |
| Ubiquiti Inc | Enterprise Firewalls | v < 5.1.31 | CVEProject cvelistV5 (CNA) |
| Ubiquiti Inc | Express | v < 4.0.21 | CVEProject cvelistV5 (CNA) |
| Ubiquiti Inc | Express 7 | v < 5.1.31 | CVEProject cvelistV5 (CNA) |
| Ubiquiti Inc | UniFi Gateways | v < 5.1.26 | CVEProject cvelistV5 (CNA) |
References and advisories
1
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Details
- Published
- 2026-09-22
- Last updated
- 2026-09-22
- State
- Published
- Assigner (CNA)
- Ubiquiti
Exploit prediction (EPSS)
0.46%
Probability of exploitation in 30 days
40.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-787Out-of-bounds write