CVEs / CVE-2021-20124
CVE-2021-20124: Draytek VigorConnect Path Traversal Vulnerability
- Known exploited in the CISA KEV catalog since 3 Sep 2024
- high 7.5 CVSS 3.1 (NVD)
- EPSS 95.9% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
Description
A local file inclusion vulnerability exists in Draytek VigorConnect 1.6.0-B3 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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a Draytek VigorConnect | 1.6.0-B3 | — |
| draytek vigorconnect | 1.6.0 | — |
Exploitation
| In CISA KEV since | 3 Sep 2024 |
|---|---|
| Due date for US federal agencies | 24 Sep 2024 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NScored by NVD |
|---|---|
| Weakness | CWE-22 |
References
- CVE-2021-20124 on NVD
- CVE-2021-20124 in the CISA KEV catalog
- https://www.draytek.com/about/security-advisory/vigorconnect-software-security-vulnerability-(cve-2021-20123-cve-2021-20129 (cited by CISA)
- https://www.tenable.com/security/research/tra-2021-42 Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20124 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.