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High 7.5Published Sep 22, 2026
CVE-2026-77555A 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.
Updated under an hour ago ()
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It affects Ubiquiti Inc Dream Machines and 7 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Ubiquiti
- NVD analysis
- Deferred
- Record last updated
- Sep 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Ubiquiti Inc Dream Machines ubiquiti:dream_machines (from the name) | before 5.1.31 | CNA record |
Ubiquiti Inc Enterprise Firewalls ubiquiti:enterprise_firewalls (from the name) | before 5.1.31 | CNA record |
Ubiquiti Inc Dream Routers ubiquiti:dream_routers (from the name) | before 5.1.31 | CNA record |
Ubiquiti Inc Cloud Gateways ubiquiti:cloud_gateways (from the name) | before 5.1.31 | CNA record |
Ubiquiti Inc Dream Wall ubiquiti:dream_wall (from the name) | before 5.1.31 | CNA record |
Ubiquiti Inc Express ubiquiti:express (from the name) | before 4.0.21 | CNA record |
Ubiquiti Inc Express 7 ubiquiti:express_7 (from the name) | before 5.1.31 | CNA record |
Ubiquiti Inc UniFi Gateways ubiquiti:unifi_gateways (from the name) | before 5.1.26 | CNA record |
References
- https://community.ui.com/releases/Security-Advisory-Bulletin-069-069/07e367a7-edec-4d85-a058-f97e5ce9ac9c
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.