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CVE-2020-15415

CRITICAL
9.8
CVSS Score
Published: June 30, 2020 at 01:37 PM UTC
Updated: June 17, 2026 at 02:56 AM UTC
6 products affected across 1 vendorVIGOR3900 FirmwareVIGOR2960 FirmwareVIGOR300B Firmware

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Severity
CRITICAL9.8
Exploitation
CISA KEV
Exploit prediction
EPSS 84%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score84.5%

EPSS (Exploit Prediction Scoring System) estimates a 84.5% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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.

Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Ransomware Use
Unknown
Added to KEV
Sep 30, 2024
Remediation Due
Oct 21, 2024
738 days overdue
Notes
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-remote-code-injection/execution-vulnerability-(cve-2020-14472)
https://nvd.nist.gov/vuln/detail/CVE-2020-15415

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

VIGOR2960 Firmware· Draytek
95%
v < 1.5.1
Affected range stops below 1.5.1, so it looks safe — our inference, not a vendor statement
draytek-vigor2960 (same device)
VIGOR300B Firmware· Draytek
95%
v < 1.5.1
Affected range stops below 1.5.1, so it looks safe — our inference, not a vendor statement
VIGOR3900 Firmware· Draytek
95%
v < 1.5.1
Affected range stops below 1.5.1, so it looks safe — our inference, not a vendor statement
Vigor300B· Draytek
90%
v < 1.5.1
Affected range stops below 1.5.1, so it looks safe — our inference, not a vendor statement
Vigor2960· Draytekdevice
80%
All versions
Vigor3900· Draytekdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_MISCExploit
Source: [email protected]
https://github.com/CLP-team/Vigor-Commond-Injection
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.draytek.com/about/security-advisory
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-15415

SSVC — Action Prioritization

SSVCActiveAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-78

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