DrayTek Vigor2960 1.5.1.6 Revision 8218 Apmupload mainfunction.cgi action path traversal

Summaryinfo

A vulnerability categorized as critical has been discovered in DrayTek Vigor2960 1.5.1.6 Revision 8218. This issue affects some unknown processing of the file /cgi-bin/mainfunction.cgi of the component Apmupload. Executing a manipulation of the argument action can lead to path traversal. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability appears as CVE-2026-113392. The attack may be performed from remote. In addition, an exploit is available. It is advisable 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.)".

Detailsinfo

A vulnerability classified as critical was found in DrayTek Vigor2960 1.5.1.6 Revision 8218. This vulnerability affects an unknown functionality of the file /cgi-bin/mainfunction.cgi of the component Apmupload. The manipulation of the argument action with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-113392. The exploitation appears to be easy. The attack can be initiated remotely. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1006.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. 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.)".

Upgrading to version 1.5.1.7 eliminates this vulnerability. The upgrade is hosted for download at fw.draytek.com.tw.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• DrayTek

Name

• Vigor2960

Version

• 1.5.1.6 Revision 8218

License

• commercial

Support

• end of life

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

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Sourcesinfo

Entryinfo

Submitinfo

Accepted

• Submit #992245: DrayTek Vigor2960 Vigor2960 1.5.1.6 (revision 8218) uthenticated apmupload Path Traversal File Clobber (by eqqie)

Once again VulDB remains the best source for vulnerability data.

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