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TI-2021-03425 Aliases CVE-2021-20125GHSA-j2q4-4x34-58rx

Path traversal in Draytek VigorConnect

Priority MEDIUM 49CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.

Summary

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.

Why it matters now

EPSS 0.03948 90th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Draytek VigorConnect1.6.0-B3—No fix listedCNA
  • Draytek VigorConnect Vendor— Affected 1.6.0-B3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:draytek:vigorconnect:1.6.0:beta3:*:*:*:*:*:*1.6.0 beta3VulnerableDrayTek
  • cpe:2.3:a:draytek:vigorconnect:1.6.0:beta3:*:*:*:*:*:* Versions 1.6.0 beta3 Vulnerable ·DrayTek

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-20125
  2. 2026-10-03 Alias added: GHSA-j2q4-4x34-58rx

References

Exploit 1

  • TI-2021-03424 Path traversal in Draytek VigorConnect KEVCVSS 3.1HIGH 7.5
  • TI-2021-03423 Path traversal in Draytek VigorConnect KEVCVSS 3.1HIGH 7.5
  • TI-2021-03426 Cross-site request forgery in Draytek VigorConnect CVSS 3.1HIGH 8.8
  • TI-2021-03427 An arbitrary file deletion vulnerability exists in the file delete functionality of the… CVSS 3.1HIGH 8.1
  • TI-2021-03429 Sensitive information in log files in Draytek VigorConnect CVSS 3.1HIGH 7.5
  • TI-2021-03428 Cross-site scripting in Draytek VigorConnect CVSS 3.1MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences