CVE-2026-3040
DrayTek Vigor 300B Web Management uploadlangs cgiGetFile os command injection
- State
- Published
- Severity
- 5.1 Medium
- Published
- Feb 23, 2026
- Updated
- Feb 25, 2026
- Reserved
- Feb 23, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 4.7 Medium | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 4.7 Medium | CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 5.8 Medium | AV:N/AC:L/Au:M/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
Vigor 300BDrayTek |
|
References
- VDB-347394 | DrayTek Vigor 300B Web Management uploadlangs cgiGetFile os command injectionvdb-entrytechnical-description
- VDB-347394 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- Submit #757126 | DrayTek Vigor 300B v1.5.1.6 OS Command Injectionthird-party-advisory
- https://github.com/master-abc/cve/issues/42exploitissue-tracking
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