Authenticated host command execution via improper input validation
Published Aug 26, 2026 · Updated Aug 26, 2026
Command injection in Ubiquiti UniFi Access Application before 4.3.5 allows remote authenticated users to execute commands on the host device. Ubiquiti has not disclosed the affected endpoint, parameter, or validation operation that passes attacker-controlled input to a command interpreter. The attacker needs low-privilege network access; successful exploitation crosses into the host and permits commands to affect its data and availability.
Summary
What happened
Command injection in Ubiquiti UniFi Access Application before 4.3.5 allows remote authenticated users to execute commands on the host device. Ubiquiti has not disclosed the affected endpoint, parameter, or validation operation that passes attacker-controlled input to a command interpreter. The attacker needs low-privilege network access; successful exploitation crosses into the host and permits commands to affect its data and availability.
The record
- CVE
- CVE-2026-77547
- Published
- Aug 26, 2026
- Updated
- Aug 26, 2026
- Vendor
- Ubiquiti Inc.
- Product
- UniFi Access Application
- Classifications
- CWE-20, T1059
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 26, 2026CVE publishedPublication date reported by the CVE source.
- Aug 26, 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.
- Affected versionversion=0 <4.3.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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