Read the docs
TI-2021-03424 Aliases CVE-2021-20124GHSA-hj9j-3xxg-6259

Path traversal in Draytek VigorConnect

Priority CRITICAL 90Exploited in the wildCWE-22Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.

Summary

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

Why it matters now

Exploitation Active In CISA KEV since 2024-09-03CISA due date 2024-09-24
EPSS 0.95917 99th 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

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

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. 2024-09-03 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2021-20124
  3. 2026-10-03 Alias added: GHSA-hj9j-3xxg-6259

References

Exploit 1

  • TI-2021-03423 Path traversal in Draytek VigorConnect KEVCVSS 3.1HIGH 7.5
  • TI-2021-03425 Path traversal in Draytek VigorConnect CVSS 3.1CRITICAL 9.8
  • 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