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CVE-2021-20125

CRITICAL

9.8

CVSS Score

Published: October 13, 2021 at 03:48 PM UTC

Updated: June 17, 2026 at 03:33 AM UTC

1 product affected across 1 vendorVigorconnect

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Severity

CRITICAL9.8

Exploit prediction

EPSS 4%

Description

An arbitrary file upload and directory traversal vulnerability exists in the file upload functionality of DownloadFileServlet in Draytek VigorConnect 1.6.0-B3. An unauthenticated attacker could leverage this vulnerability to upload files to any location on the target operating system with root privileges.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vigorconnect · Draytek

95%

1.6.0 beta3 1.6.0-B3

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCExploitThird Party Advisory

Source: [email protected]

https://www.tenable.com/security/research/tra-2021-42

CVSS

9.8CRITICAL[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-22CWE-434

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