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OpenAdvisories
High · 7.5 CVE-2026-77544 EUVD-2026-84753GHSA-cgjh-gg68-hw7w

A malicious actor with access to the network could exploit an Out-of-bounds Write vulnerability found in certain UniFi gateway devices to e…

Published Sep 22, 2026 · Updated Sep 22, 2026 · Assigned by Ubiquiti

Vendor: Ubiquiti Product: Cloud Gateways Product: Dream Machines Product: Dream Routers Product: Dream Wall Product: Enterprise Firewalls Product: Express Product: Express 7 Product: UniFi Gateways Category: Network devices

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.

Affected products

VendorProductAffectedFixed
Ubiquiti Dream Machines < 5.1.31 5.1.31
Ubiquiti Enterprise Firewalls < 5.1.31 5.1.31
Ubiquiti Dream Routers < 5.1.31 5.1.31
Ubiquiti Cloud Gateways < 5.1.31 5.1.31
Ubiquiti Dream Wall < 5.1.31 5.1.31
Ubiquiti Express < 4.0.21 4.0.21
Ubiquiti Express 7 < 5.1.31 5.1.31
Ubiquiti UniFi Gateways < 5.1.26 5.1.26

Advisories 1

References