DrayTek - RCE (CVE-2020-15415)
214Exploiting IPs reported
On DrayTek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1, cgi-bin/mainfunction.cgi/cvmcfgupload allows remote command execution via shell metacharacters in a filename when the text/x-python-script content type is used, a different issue than CVE-2020-14472.
CrowdSec analysis
CVE-2020-15415 is a remote command execution vulnerability affecting several DrayTek Vigor network devices, allowing unauthenticated attackers to execute arbitrary commands by leveraging improper input handling in a specific upload endpoint.
CrowdSec has been tracking this vulnerability and its exploits since 28th of May 2025.
Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2020-15415 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. Data from the CrowdSec community also indicates a gradual decrease in attacks targeting CVE-2020-15415. While still present in the wild, exploitation levels have dropped noticeably week-over-week. This may signal that the vulnerability is becoming less relevant or that defenses are improving fast enough for attackers to lose interest.
Exploitation attempts are identifiable by requests to URLs containing /cgi-bin/mainfunction.cgi/cvmcfgupload.
Exploitation
Get real-time information about exploitation attempts and actors involved.
Common Weakness Enumeration (CWE)
Protection
Find out relevant information to protect your stack against this CVE.
Blocklist
With our advanced worldwide network detection, CrowdSec can provide a list of IPs known for exploiting the vulnerability.
To increase your protection against this CVE, block exploitation attempts with this list of identified actors.