CVE-2026-77545Network attack vector

Privilege escalation via undisclosed active debug code

Published Aug 26, 2026 · Updated Aug 27, 2026

Active debug code in Ubiquiti UniFi OS allows remote authenticated users to escalate privileges through network access. Ubiquiti has not disclosed the debug component or the wrong operation that exposes elevated functionality. Exploitation requires low privileges, user interaction, and unspecified additional conditions; successful abuse grants elevated control within the device or instance.

CVSS severity9.0
Critical
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Active debug code in Ubiquiti UniFi OS allows remote authenticated users to escalate privileges through network access. Ubiquiti has not disclosed the debug component or the wrong operation that exposes elevated functionality. Exploitation requires low privileges, user interaction, and unspecified additional conditions; successful abuse grants elevated control within the device or instance.

The record

CVE
CVE-2026-77545
Published
Aug 26, 2026
Updated
Aug 27, 2026
Vendor
Ubiquiti Inc.
Product
UniFi Cloud Keys
Classifications
CWE-489, CAPEC-661, CAPEC-121, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.1.31

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Ubiquiti Inc. · UniFi Cloud Keysversion=0 <5.1.31
Ubiquiti Inc. · UniFi Network Video Recordersversion=0 <5.1.31
Ubiquiti Inc. · UniFi Express 7version=0 <5.1.31
Ubiquiti Inc. · Enterprise Fortress Gatewayversion=0 <5.1.31
Ubiquiti Inc. · Enterprise Firewall Coreversion=0 <5.1.31
Ubiquiti Inc. · UniFi Network Attached Storageversion=0 <5.1.32
Ubiquiti Inc. · UniFi Cloud Gatewaysversion=0 <5.1.31
Ubiquiti Inc. · UniFi Enterprise Network Video Recordersversion=0 <5.1.31
Ubiquiti Inc. · Dream Machinesversion=0 <5.1.31
Ubiquiti Inc. · UniFi OS Serverversion=0 <5.1.37
Ubiquiti Inc. · Dream Wallversion=0 <5.1.31
Ubiquiti Inc. · UniFi Enterprise Network Attached Storageversion=0 <5.1.31
Ubiquiti Inc. · Dream Routersversion=0 <5.1.31

Published CVSS scores

9.0UbiquitiCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-489Active Debug Code
CAPEC-661Root/Jailbreak Detection Evasion via Debugging
CAPEC-121Exploit Non-Production Interfaces
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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