CVE-2021-20123A local file inclusion vulnerability exists in Draytek VigorConnect 1.6.0-B3 in the file download functionality of the DownloadFileServlet endpoint.
Updated under an hour ago ()
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CISA lists it as known exploited since Sep 3, 2024; federal agencies had to remediate by Sep 24, 2024. Treat that date as your deadline.
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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.
- CVSS
- 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-22
- Known exploited
- Added to CISA KEV Sep 3, 2024; federal remediation due Sep 24, 2024Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 90.23% (percentile 100)
- Assigned by
- tenable
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
draytek vigorconnect draytek:vigorconnect | 1.6.0 | CISA ADP |
draytek vigorconnect draytek:vigorconnect | 1.6.0 | NVD |
References
- https://www.tenable.com/security/research/tra-2021-42x-refsource-misc, exploit, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20123us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.