CVE-2026-71961
CVE-2026-71961
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.027 (85.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.027 · change: -0.003
Weakness classification (CWE)
References
- www.cudy.com/en-us/pages/download-center/wr3000-2-0 (release-notes)
- www.vulncheck.com/advisories/cudy-wr3000-os-command-injection-via-mesh-mqtt-com… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-71961?
- CVE-2026-71961 is a high-severity vulnerability, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-08-19.
- How severe is CVE-2026-71961?
- High severity. CVSS v3 base score is 8.8 out of 10.