CVE-2026-71938 — DrayTek VigorSwitch Multiple Models Buffer Overflow via switch_lan_gvrp
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 …
Published: 2026-08-24 · CVSS: 8.6 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7