CVE-2021-20123Actively exploitedAdded to KEV 2024-09-03High severity, CVSS 7.5

Draytek VigorConnect Path Traversal Vulnerability

DrayTek, VigorConnect

Description

Draytek VigorConnect contains a path traversal vulnerability in the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.

CVSS severity

High (7.5/10)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Sourced from NVD, reflects how severe this vulnerability is if exploited, not whether it has been. Every advisory on this page is already a CISA-confirmed active exploitation case regardless of its CVSS score.

EPSS, exploit probability

Critical

89.7%

estimated chance of real-world exploitation in the next 30 days, higher than 99.8% of every CVE FIRST.org scores

Refreshed 10/28/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.

Public exploit references (via NVD)

Required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA-recommended due date: 2024-09-24

CWE-22

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