Command execution via undisclosed input validation flaw
Published May 22, 2026 · Updated May 22, 2026
Command injection in Ubiquiti UniFi OS Server before 5.0.8 allows remote authenticated users with high privileges to execute commands. Ubiquiti has not disclosed the affected component, input, or validation path that passes attacker-controlled data to a command interpreter. Network access and a high-privileged account are required; successful exploitation executes commands in the server context.
Summary
What happened
Command injection in Ubiquiti UniFi OS Server before 5.0.8 allows remote authenticated users with high privileges to execute commands. Ubiquiti has not disclosed the affected component, input, or validation path that passes attacker-controlled data to a command interpreter. Network access and a high-privileged account are required; successful exploitation executes commands in the server context.
The record
- CVE
- CVE-2026-33000
- Published
- May 22, 2026
- Updated
- May 22, 2026
- Vendor
- Ubiquiti Inc.
- Product
- UniFi OS Server
- Classifications
- CWE-20, T1059
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- May 22, 2026CVE publishedPublication date reported by the CVE source.
- May 22, 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 <5.0.8
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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