Unrestricted File Upload Vulnerability in DrayTek Vigor2960 Router
CVE-2026-113393

5.3MEDIUM

Key Information:

Vendor

Draytek
Status
Vigor2960
Vendor
CVE Published:
20 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-113393?

A vulnerability exists in the DrayTek Vigor2960 router that allows attackers to exploit the file processing system in /cgi-bin/mainfunction.cgi of the commonupload component. By manipulating the parameters upload_path and upload_name, an attacker may perform an unrestricted upload of malicious files, potentially leading to severe consequences if exploited. This vulnerability affects versions that are no longer supported by DrayTek. Users are strongly advised to upgrade to version 1.5.1.7, which addresses numerous security concerns, including this one. However, it's important to note that the Vigor2960 is at its end-of-support (EoS) stage, meaning ongoing support will only cover critical issues.

Affected Version(s)

Vigor2960 1.5.1.6 Revision 8218

Vigor2960 1.5.1.7

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-113393 - Proof of Concept

References

https://vuldb.com/vuln/422669
vdb-entrytechnical-description
https://vuldb.com/vuln/422669/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-113393
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

eqqie (VulDB User)
VulDB CNA Team
.