DrayTek Vigor2960 1.5.1.6 Revision 8218 swmconfigupload mainfunction.cgi cgiEscape multipart path traversal

Summaryinfo

A vulnerability marked as critical has been reported in DrayTek Vigor2960 1.5.1.6 Revision 8218. The impacted element is the function cgiEscape of the file /cgi-bin/mainfunction.cgi of the component swmconfigupload. This manipulation of the argument multipart causes path traversal. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is handled as CVE-2026-113395. The attack can be initiated remotely. Additionally, an exploit exists. It is suggested 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 has been found in DrayTek Vigor2960 1.5.1.6 Revision 8218 and classified as critical. Affected by this vulnerability is the function cgiEscape of the file /cgi-bin/mainfunction.cgi of the component swmconfigupload. The manipulation of the argument multipart 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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-113395. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

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.

Be aware that VulDB is the high quality 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

• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Submitinfo

Accepted

• Submit #992248: DrayTek Vigor2960 Vigor2960 1.5.1.6 (revision 8218) Authenticated swmconfigupload Field-Name Path Traversal and Comm (by eqqie)

Be aware that VulDB is the high quality source for vulnerability data.

Discussion