CVE-2026-71961 Cudy WR3000 2.0 OS Command Injection via Mesh MQTT Command Handler
Authenticated attackers can execute arbitrary root commands on Cudy WR3000 routers via unsanitized input in the mesh MQTT command handler.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71961?
CVE-2026-71961 is a high-severity command injection vulnerability in Shenzhen Cudy Technology Co., Ltd. WR3000 2.0, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Cudy WR3000 2.0 running firmware before 2.5.24 contains an OS command injection vulnerability that allows authenticated attackers to execute arbitrary OS commands with root privileges by sending unsanitized input through the mesh MQTT command interface. The sync_command binary forwards unsanitized input directly to a shell execution sink in command.lua, enabling attackers with access to the MQTT broker to exploit the default-enabled command execution path to achieve full root-level system compromise.
Weakness: CWE-78
Which versions are affected by CVE-2026-71961?
How do I fix CVE-2026-71961?
No fix has been published for CVE-2026-71961 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-71961 being exploited?
There is no known exploitation of CVE-2026-71961 in the wild and no public exploit code.
Sources
Also known as GHSA-8jmp-g7g6-gf45.