DrayTek VigorConnect
YES - ON THE CISA KEV LIST
CVE-2021-20123
Draytek VigorConnect Path Traversal Vulnerability
overdue since 2024-09-24
DrayTek: 5 entries (0.3% of all KEV entries are from this vendor); 0 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
Description
Draytek VigorConnect contains a path traversal vulnerability in the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.
Required action (CISA)
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes
https://www.draytek.com/about/security-advisory/vigorconnect-software-security-vulnerability-(cve-2021-20123-cve-2021-20129); https://nvd.nist.gov/vuln/detail/CVE-2021-20123
References
Other KEV entries for this vendor: DrayTek
- CVE-2024-12987 - Vigor Routers (2025-05-15)
- CVE-2020-15415 - Multiple Vigor Routers (2024-09-30)
- CVE-2021-20124 - VigorConnect (2024-09-03)
- CVE-2020-8515 - Multiple Vigor Routers (2021-11-03)
Go deeper
KEV deadlines are a governance problem as much as a patching one. TrebSec's AI governance packs help small teams document, assign, and evidence exactly this work.
AI Governance Policy Pack - $79 AI Vendor Workbook - $49 Both packs bundled - $99