CVE-2021-20124 — Draytek VigorConnect Path Traversal Vulnerability
Overview
Draytek VigorConnect contains a path traversal vulnerability 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.
Vulnerability details
- CVE ID
- CVE-2021-20124
- Vulnerability
- Draytek VigorConnect Path Traversal Vulnerability
- Vendor
- DrayTek
- Affected products
- DrayTek: VigorConnect
- Severity
- HIGH
- Exploitation status
- Actively exploited in the wild (CISA KEV)
- Published
- 2024-09-03
Remediation guidance
CVE-2021-20124 is in CISA's Known Exploited Vulnerabilities (KEV) catalog — U.S. federal civilian agencies are required to remediate it under Binding Operational Directive 22-01. Treat it as a priority for every environment.
Apply the vendor's official security update for DrayTek the affected product as soon as possible. Where a patch is unavailable, apply vendor mitigations or isolate/segment exposed systems.
Hunt for indicators of compromise tied to this vulnerability and confirm logging/EDR coverage on affected assets.
Authoritative references
Remediate CVE-2021-20124 — and stay ahead of the next one
CVE-2021-20124 is listed in the CISA KEV catalog as actively exploited — treat remediation as urgent. Scan your domain free to see whether CVE-2021-20124 and other DrayTek issues affect you and get a prioritized remediation report (full report from ₹999) — or stream the full feed of 1,600+ actively-exploited CVEs straight into your SOC.
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