CVE-2020-15415

KEVDrayTek Multiple Vigor Routers OS Command Injection Vulnerability

Description

DrayTek Vigor3900, Vigor2960, and Vigor300B devices contain an OS command injection vulnerability in cgi-bin/mainfunction.cgi/cvmcfgupload that allows for remote code execution via shell metacharacters in a filename when the text/x-python-script content type is used.

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.

CVSS 3.1 vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

PublishedJun 30, 2020

Last modifiedJun 17, 2026

Added to KEVSep 30, 2024

Remediation dueOct 21, 2024

References

github.com/CLP-team/Vigor-Commond-InjectionExploit
draytek.com/about/security-advisoryVendor Advisory
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-15415US Government Resource

0 recent articles mention this CVE

Risk assessment · Critical

Actively exploited. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 735 days
CVSS: 9.8 CRITICAL
EPSS (30-day exploit probability): 84.5% · top 1% of all CVEs
Weakness: CWE-78
Attack vector: Network, remotely reachable
Preconditions: No privileges and no user interaction

Recommended actions

1.Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.