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Fencer Intel
critical 9.8

CVE-2020-15415 kev in the critical feed json

On DrayTek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1, cgi-bin/mainfunction.cgi/cvmcfgupload allows remote command execution…

published 6y ago modified 4mo ago also EUVD-2020-7408

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2024-09-30
epss
84.5%
EPSS 84.5% chance of exploitation in 30 days, percentile 99.7%
public exploits
0
none known, plus a Nuclei check

Summary

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.

Patch / fix

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

  • draytek vigor3900_firmware 1.5.1
  • draytek vigor2960_firmware 1.5.1
  • draytek vigor300b_firmware 1.5.1

Is CVE-2020-15415 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA SSVC: exploitation active
  4. CISA patch deadline

Known exploited

Added
2y ago
Patch by
2024-10-21 (2y ago)
Ransomware
Not known
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor, product
DrayTek, Multiple Vigor Routers
CISA name
DrayTek Multiple Vigor Routers OS Command Injection Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
2y ago

Exploit prediction

84.48% chance of exploitation in the next 30 days, higher than 99.7% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • Nuclei template DrayTek Vigor - Command Injection nuclei detection template
  • github.com https://github.com/CLP-team/Vigor-Commond-Injection referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • draytek vigor3900_firmware
  • draytek vigor2960_firmware
  • draytek vigor300b_firmware

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.