CVE-2020-14472 — On Draytek Vigor3900, Vigor2960, and Vigor 300B devices before 1

On Draytek Vigor3900, Vigor2960, and Vigor 300B devices before 1.5.1.1, there are some command-injection vulnerabilities in the mainfunction.cgi file.

01What is this vulnerability?

On Draytek Vigor3900, Vigor2960, and Vigor 300B devices before 1.5.1.1, there are some command-injection vulnerabilities in the mainfunction.cgi file.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2020-06-24T16:51:23.000Z
• Last modified: 2024-08-04T12:46:34.614Z

09References

• gist.github.com — https://gist.github.com/WinMin/46165779215f1d47ec257210428c0240
• gist.github.com — https://gist.github.com/Cossack9989/fa9718434ceee4e6d4f6b0ad672c10f1