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CVE-2026-3040

MEDIUM CVSS 4.0: 5.1 EPSS 0.43%
Updated Feb 24, 2026
Parameter Value
CVSS 5.1 (MEDIUM)
Type CWE-78 (OS Command Injection), CWE-77 (Command Injection)
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption

CVSS Vector v4.0