CVE-2021-20123
Draytek VigorConnect Path Traversal Vulnerability
- Published
- Oct 13, 2021
- Updated
- Oct 21, 2025
- Assigning CNA
- tenable
- Evidence observed
- Sep 3, 2024
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NHigh · next 30 days
- Percentile
- 99.8%
- Model date
- Oct 17, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
A local file inclusion vulnerability exists in Draytek VigorConnect 1.6.0-B3 in the file download functionality of the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.
Sources
http/cves/2021/CVE-2021-20123.yaml
Nuclei TemplatesDeclared conditions
- network: http($.protocol_keys)
- verification: regex,status,word($.matchers[*].type)
Responsible use
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