CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- DrayTek Multiple Vigor Routers OS Command Injection Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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 products
draytek: vigor3900 firmware; draytek: vigor3900; draytek: vigor2960 firmware; draytek: vigor2960; draytek: vigor300b firmware; draytek: vigor300b
References5
- www.draytek.com/about/security-advisory Vendor Advisory
- www.draytek.com/about/security-advisory Vendor Advisory
- github.com/CLP-team/Vigor-Commond-Injection Exploit
- github.com/CLP-team/Vigor-Commond-Injection Exploit
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=… US Government Resource
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 84% percentile: 100 · as of 2 November 2026
- CWE
- CWE-78