CVE-2026-71937 — DrayTek VigorSwitch Multiple Models Buffer Overflow via poe_schedule_profile
Multiple DrayTek VigorSwitch models contain a buffer overflow vulnerability in the poe_schedule_profile function. The vulnerability is caused by repeated concatenation of the st…
Published: 2026-08-24 · CVSS: 8.6 · CVSS 4.0
Multiple DrayTek VigorSwitch models contain a buffer overflow vulnerability in the poe_schedule_profile function. The vulnerability is caused by repeated concatenation of the start_date, start_time, duration_time, how_often, weekdays, monthly_date, and cycle_duration fields into small fixed-size buffers without proper length checks. 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