CVE-2026-113391: DrayTek Vigor2960 Upload Endpoint mainfunction.cgi uploadlangs command injection
A vulnerability has been found in DrayTek Vigor2960 1.5.1.6 Revision 8218. This affects the function uploadlangs of the file /cgi-bin/mainfunction.cgi of the component Upload Endpoint. Such manipulation leads to command injection. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 1.5.1.7 is able to mitigate this issue. It is recommended to upgrade the affected component. The vendor explains: "2960 1.5.1.7 has corrected many security issues. And 2960 is EoS with limited support, only major issues would be reviewed(e.g. unauthenticated vuln.)". This vulnerability only affects products that are no longer supported by the maintainer.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
DrayTek Vigor2960to a version that resolves this vulnerability.Fixed in 1.5.1.7
Event History
Frequently Asked Questions
Which systems are affected?
DrayTek Vigor2960 devices running version 1.5.1.6 Revision 8218 are affected. The issue applies to products that are no longer supported by the maintainer.
What does an attacker need to exploit this issue?
The attack can be performed remotely and targets the uploadlangs function in /cgi-bin/mainfunction.cgi. The published severity vector indicates that low privileges are required, while no user interaction is required.
Is exploit code or public exploitation information available?
Yes. The exploit has been publicly disclosed and may be used.
What remediation is available?
Upgrade the Vigor2960 firmware to version 1.5.1.7, which mitigates the issue. The vendor notes that the model is end-of-support and receives only limited review for major issues.