CVE-2026-77556: CWE-125 Out-of-bounds read in Ubiquiti Inc Dream Machines
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.
AI Analysis
Technical Summary
This vulnerability (CWE-125) involves an out-of-bounds read in certain versions of Ubiquiti Dream Machines UniFi gateway devices. An attacker with network access can exploit this flaw to trigger a Denial of Service (DoS) attack, causing the device to become unresponsive or crash. The CVSS 3.1 base score is 7.5, reflecting high severity due to the network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability.
Potential Impact
Exploitation leads to a Denial of Service (DoS) on the affected UniFi gateway device, disrupting network availability. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, network administrators should limit network access to trusted users and monitor device stability.
CVE-2026-77556: CWE-125 Out-of-bounds read in Ubiquiti Inc Dream Machines
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.
CVSS v3.1
Score 7.5high
Affected software
Ubiquiti Inc
Dream Machines
Ubiquiti Inc
Enterprise Firewalls
Ubiquiti Inc
Dream Routers
Ubiquiti Inc
Cloud Gateways
Ubiquiti Inc
Dream Wall
Ubiquiti Inc
Express
Ubiquiti Inc
Express 7
Ubiquiti Inc
UniFi Gateways
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-125) involves an out-of-bounds read in certain versions of Ubiquiti Dream Machines UniFi gateway devices. An attacker with network access can exploit this flaw to trigger a Denial of Service (DoS) attack, causing the device to become unresponsive or crash. The CVSS 3.1 base score is 7.5, reflecting high severity due to the network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability.
Potential Impact
Exploitation leads to a Denial of Service (DoS) on the affected UniFi gateway device, disrupting network availability. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, network administrators should limit network access to trusted users and monitor device stability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Ubiquiti
- Date Reserved
- 2026-08-20T20:32:43.655Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab2cd74f7a7c54106997ea7
Added to database: 09/22/2026, 18:48:20 UTC
Last enriched: 09/22/2026, 19:02:43 UTC
Last updated: 09/22/2026, 19:49:04 UTC
Views: 6
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