# CVE-2020-15415: DrayTek - RCE

> Live exploitation tracking for CVE-2020-15415 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2020-15415

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 9.8
- **Public exploit available:** Yes
- **Affected products:** DrayTek Vigor3900, DrayTek Vigor2960, DrayTek Vigor300B
- **Weaknesses:** CWE-78 (Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'))
- **Tags:** iot

## Description

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](https://euvd.enisa.europa.eu/vulnerability/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.
CrowdSec network telemetry also shows that exploitation of CVE-2020-15415 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.

Exploitation attempts are identifiable by requests to URLs containing `/cgi-bin/mainfunction.cgi/cvmcfgupload`.

## Timeline

- 2020-06-30: CVE Published. CVE-2020-15415 is published to NVD.
- 2024-09-30: CISA KEV. CVE-2020-15415 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2024-10-21: CISA Remediation Deadline. Expiration of the CISA remediation deadline as described in [BOD 22-01](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities).
- 2025-05-28: Rule Released. CrowdSec releases a rule to detect CVE-2020-15415 exploitation attempts against the CrowdSec Network.
- 2025-05-28: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2020-15415 for the first time.

## References

- https://github.com/CLP-team/Vigor-Commond-Injection
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-15415.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2020-15415) follows observed exploitation activity for CVE-2020-15415. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.