Is CVE-2026-71938 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-71938?

CVE-2026-71938 has a CVSS v3 severity of HIGH (7.2).

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CVE-2026-71938

Description

Multiple DrayTek VigorSwitch models contain a buffer overflow vulnerability in the switch_lan_gvrp function. The vulnerability is caused by unsafe copying of the portList field into an undersized buffer. A remote attacker can trigger this vulnerability via crafted input, causing a denial of service or potentially executing arbitrary commands. Exploitation requires valid administrative credentials for the device's web management interface.