Is CVE-2021-20123 actively exploited?

CVE-2021-20123 has no public evidence of in-the-wild exploitation as of 2025-11-03.

What is the CVSS score for CVE-2021-20123?

CVE-2021-20123 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

How do I patch CVE-2021-20123?

Patch guidance is available from draytek security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-20123.

Which products are affected by CVE-2021-20123?

1 product: draytek vigorconnect.

Fix CVE-2021-20123 - HIGH draytek vigorconnect

Description

A local file inclusion vulnerability exists in Draytek VigorConnect 1.6.0-B3 in the file download functionality of the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: none
Weaknesses: CWE-22 · Path Traversal CWE-22 · Path Traversal

Metadata

Primary Vendor: DRAYTEK
Published: 10/13/2021
Last Modified: 11/3/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-20123

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary