Is CVE-2026-71931 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-71931?

CVE-2026-71931 has a CVSS v3 severity of HIGH (7.2).

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CVE-2026-71931

Description

Multiple DrayTek VigorSwitch models contain a command injection vulnerability in the tftp_upgrade function. The vulnerability is caused by insufficient filtering before the filename field is concatenated into a command. A remote attacker can trigger this vulnerability via crafted input to execute arbitrary commands with root privileges. Exploitation requires valid administrative credentials for the device's web management interface.