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.

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)

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.

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.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.