Vulnerability Description
A vulnerability was identified in DrayTek Vigor 300B up to 1.5.1.6. This affects the function cgiGetFile of the file /cgi-bin/mainfunction.cgi/uploadlangs of the component Web Management Interface. The manipulation of the argument File leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor confirms that "300B is EoL, and this is an authenticated vulnerability. We don't plan to fix it." This vulnerability only affects products that are no longer supported by the maintainer.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Draytek | Vigor300B Firmware | <= 1.5.1.6 |
| Draytek | Vigor300B | - |
Related Weaknesses (CWE)
References
- https://github.com/master-abc/cve/issues/42ExploitIssue Tracking
- https://vuldb.com/?ctiid.347394Permissions RequiredThird Party AdvisoryVDB Entry
- https://vuldb.com/?id.347394Third Party AdvisoryVDB Entry
- https://vuldb.com/?submit.757126Third Party AdvisoryVDB Entry
FAQ
What is CVE-2026-3040?
CVE-2026-3040 is a vulnerability with a CVSS score of 4.7 (MEDIUM). A vulnerability was identified in DrayTek Vigor 300B up to 1.5.1.6. This affects the function cgiGetFile of the file /cgi-bin/mainfunction.cgi/uploadlangs of the component Web Management Interface. Th...
How severe is CVE-2026-3040?
CVE-2026-3040 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-3040?
Check the references section above for vendor advisories and patch information. Affected products include: Draytek Vigor300B Firmware, Draytek Vigor300B.