VULNERABILITY INTELLIGENCE

CVE-2026-71931

CVSS score7.2 HIGH
EPSS probability1.78%
CISA KEVNot currently listed
Published2026-08-24
Last modified2026-10-12
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-78

Primary references