CVE-2021-20124
Actively exploited. CVE-2021-20124 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-09-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2021-20124 is indexed in Nuclei. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
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.
CSIRTS triage
- What
- VigorConnect has a path traversal vulnerability that allows unauthenticated attackers to download arbitrary files.
- Who is affected
- Unauthenticated attackers targeting Draytek VigorConnect deployments.
- Urgency
- Immediate action is required due to active exploitation and critical severity.
- Action
- Apply the latest patches for VigorConnect to resolve the vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2021-20124 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- NucleiA nuclei-templates detection/PoC template exists for this CVE.look it up ↗
Advisory coverage (1)
- criticalexploitedCVE-2021-20124: Draytek VigorConnect Path Traversal Vulnerabilitycisa-kev · 2024-09-03
External references
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[](https://www.csirts.com/cve/CVE-2021-20124)