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CVE-2021-20124: Draytek VigorConnect Path Traversal Vulnerability

criticalknown exploitedpublic exploitCVE-2021-20124
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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

vendor: Draytekproduct: VigorConnectPath traversal
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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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2024-09-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-20124

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2021-20124coverage & exploitation statusNVD · CVE.org

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