DrayTek VigorConnect - LFI (CVE-2021-20124)
98Exploiting IPs reported
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.
CrowdSec analysis
CVE-2021-20124 is a vulnerability present in DrayTek VigorConnect that allows unauthenticated attackers to perform local file inclusion through the WebServlet endpoint, which could enable the unauthorized download of arbitrary files with elevated privileges.
CrowdSec has been tracking this vulnerability and its exploits since 10th of March 2025.
Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2021-20124 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. In addition, according to the CrowdSec network, attack volume against CVE-2021-20124 has dipped slightly compared to the previous week. Although still commonly targeted, the decline suggests a cooling-off period. Long-term relevance remains, but attention is waning.
Exploitation attempts typically involve requests to URLs containing both acsserver/webservlet and act=getmapimg_acs2.
Exploitation
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Common Weakness Enumeration (CWE)
Protection
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Blocklist
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