VULNERABILITY INTELLIGENCE

CVE-2026-71935

CVSS score7.2 HIGH
EPSS probability0.68%
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 buffer overflow vulnerability in the webBackupAction function. The vulnerability is caused by repeated string concatenation of the pathN, valueN, key, and option fields into fixed-size stack buffers without total 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.

Weakness classification

  • disclosure@vulncheck.com: CWE-120

Primary references