CVE-2026-77544
Deferred Deferred - Pending Action

Out-of-Bounds Write in UniFi Gateway Devices Leads to DoS

Publication date: 2026-09-22

Last updated on: 2026-09-22

Assigner: fe490ce8-0395-4072-90d8-2707e1bdf984

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.

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Meta Information

Published
2026-09-22
Last Modified
2026-09-22
Generated
2026-09-22
AI Q&A
2026-09-22
EPSS Evaluated
N/A
NVD
CVE-2026-77544
EUVD
EUVD-2026-84753

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
ubiquiti unifi_gateway *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This vulnerability is an Out-of-bounds Write flaw in certain UniFi gateway devices. A malicious actor on the network could exploit it to cause a Denial of Service (DoS) attack, crashing or disabling the device.

Impact Analysis

If exploited, this vulnerability could disrupt network services by crashing your UniFi gateway device, leading to downtime and loss of connectivity for devices relying on it.

Mitigation Strategies

Update UniFi gateway devices to the latest firmware version as soon as possible to patch the Out-of-bounds Write vulnerability.

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