Root command execution via mesh MQTT command injection
Published Aug 19, 2026 · Updated Aug 20, 2026
OS command injection in Cudy WR3000 2.0 firmware before 2.5.24 allows remote authenticated users to execute root commands via mesh MQTT. The sync_command binary passes mesh command input to a shell execution sink in command.lua without neutralizing shell metacharacters, so attacker-controlled MQTT fields become operating-system commands. Exploitation requires prior access to the MQTT broker and a network path to the mesh control interface, but the disclosed command path runs as root and can yield full device compromise.
Summary
What happened
OS command injection in Cudy WR3000 2.0 firmware before 2.5.24 allows remote authenticated users to execute root commands via mesh MQTT. The sync_command binary passes mesh command input to a shell execution sink in command.lua without neutralizing shell metacharacters, so attacker-controlled MQTT fields become operating-system commands. Exploitation requires prior access to the MQTT broker and a network path to the mesh control interface, but the disclosed command path runs as root and can yield full device compromise.
The record
- CVE
- CVE-2026-71961
- Published
- Aug 19, 2026
- Updated
- Aug 20, 2026
- Vendor
- Cudy
- Product
- WR3000
- Classifications
- CWE-78, T1059.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 19, 2026CVE publishedPublication date reported by the CVE source.
- Aug 20, 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 <2.5.24
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
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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