CVE-2026-77558

Out-of-Bounds Read in UniFi Gateway Firmware Enables Device Denial of Service

Published Sep 22, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
A malicious actor with access to the network could exploit an Out-of-bounds Read vulnerability found in certain UniFi gateway devices to execute a Denial of Service (DoS) attack on the device.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Ubiquiti
Ubiquiti cloud Gateways
Ubiquiti dream Machines
Ubiquiti dream Routers
Ubiquiti dream Wall
Ubiquiti enterprise Firewalls
Ubiquiti express
Ubiquiti express 7
Ubiquiti unifi Gateways
Vendors & Products Ubiquiti
Ubiquiti cloud Gateways
Ubiquiti dream Machines
Ubiquiti dream Routers
Ubiquiti dream Wall
Ubiquiti enterprise Firewalls
Ubiquiti express
Ubiquiti express 7
Ubiquiti unifi Gateways
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Out-of-Bounds Read in UniFi Gateway Firmware Enables Device Denial of Service
Type Values Removed Values Added
Description A malicious actor with access to the network could exploit an Out-of-bounds Read vulnerability found in certain UniFi gateway devices to execute a Denial of Service (DoS) attack on the device.
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Ubiquiti
Published
Updated
Sep 22, 2026, 7:33 PM
Reserved
Aug 20, 2026, 8:32 PM
Status
Deferred
Published
Sep 22, 2026, 7:16 PM
Modified
Sep 22, 2026, 8:17 PM