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Vulnerabilities

Vulnerability · CVE-2020-15415

DrayTek Multiple Vigor Routers OS Command Injection Vulnerability

Published Jun 30, 2020 · catalog updated Jun 16, 2026 · DrayTek Vigor Routers

Patch now

CVE-2020-15415 is in the CISA known-exploited catalog, due Oct 21, 2024. Confirm DrayTek Vigor Routers against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
84.48%
Remediation
Remediation guidance
Affected products
cpe draytek/vigor2960 firmware · cpe draytek/vigor300b firmware · cpe draytek/vigor3900 firmware · vendor DrayTek Multiple Vigor Routers · vendor DrayTek Vigor Routers

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. VulnCheck canary evidence.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe draytek/vigor2960 firmwareversion unspecified
  • cpe draytek/vigor300b firmwareversion unspecified
  • cpe draytek/vigor3900 firmwareversion unspecified
  • vendor DrayTek Multiple Vigor Routersversion unspecified
  • vendor DrayTek Vigor Routersversion unspecified

How to fix CVE-2020-15415

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2020-15415 is in the CISA known-exploited catalog, due Oct 21, 2024. Confirm DrayTek Vigor Routers against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-78: OS Command Injection. EPSS 84.48%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 30, 2020 · Catalog

    Detected

    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.

  2. Sep 30, 2024 · CISA KEV

    Known exploited

    Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

  3. Oct 21, 2024 · CISA KEV

    Remediation due

    Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2020-15415

    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.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2020-15415

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-15415

    30-day exploitation probability 84.5%

    first.org
  • NIST NVDVulnerability recordCVE-2020-15415

    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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2020-15415

    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.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.