Coverage › CVE-2021-20123
CVE-2021-20123 Unmapped
Draytek VigorConnect Path Traversal Vulnerability
- Vendor / product
- DrayTek — VigorConnect
- Description (CISA)
- 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.
- Added to KEV
- 2024-09-03
- Due date
- 2024-09-24
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Known ransomware use
- Unknown
- CWE
- CWE-22
- CISA 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 - Elsewhere
- cve.org · NVD · CISA KEV · JSON
ATT&CK techniques
No public source states how this vulnerability is exploited in ATT&CK terms.
The only authoritative CVE → ATT&CK mapping in the open — CTID's Mappings Explorer, pinned to a KEV snapshot of 2025-07-28 and ATT&CK 16.1 — does not include CVE-2021-20123. CISA's catalogue carries no technique field. kevmap does not infer techniques from the CWE (CWE-22) — here is why — and does not guess.
This page will change state automatically if a mapping is published. What is shown above is everything CISA publishes about the entry.