Unauthenticated shell execution via unvalidated package name
Published May 22, 2026 · Updated May 22, 2026
Command injection in Ubiquiti UniFi OS allows remote attackers with network access to execute arbitrary shell commands. The package-update latest_package handler interpolates a caller-controlled package name into a command string that a sh -c wrapper executes without validation. The unauthenticated path uses an authentication-gateway bypass, and passwordless sudo rights permit root access.
Summary
What happened
Command injection in Ubiquiti UniFi OS allows remote attackers with network access to execute arbitrary shell commands. The package-update latest_package handler interpolates a caller-controlled package name into a command string that a sh -c wrapper executes without validation. The unauthenticated path uses an authentication-gateway bypass, and passwordless sudo rights permit root access.
The record
- CVE
- CVE-2026-34910
- Published
- May 22, 2026
- Updated
- May 22, 2026
- Vendor
- Ubiquiti Networks
- Product
- Enterprise NVR
- Classifications
- CWE-20, T1190, T1059.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 22, 2026CVE publishedPublication date reported by the CVE source.
- May 22, 2026Record updatedLatest update available in the CVE record.
- Jun 23, 2026Exploitation reportedCISA Known Exploited Vulnerability listing
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 <5.1.12
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.
Activity data is delayed. The latest report is Sep 28, 2026.
View daily counts
| Reporting day | Unique IPs |
|---|---|
| Sep 22, 2026 | 3 |
| Sep 23, 2026 | Unavailable |
| Sep 24, 2026 | Unavailable |
| Sep 25, 2026 | 1 |
| Sep 26, 2026 | 2 |
| Sep 27, 2026 | 3 |
| Sep 28, 2026 | 1 |
Weakness, pattern, technique
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.
Reported exploitation
- CISA Known Exploited Vulnerability listingknown exploited catalog
- Mirai botnet exploitation activitybotnet
Technologies
Your stack
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Your stack
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