Os Command Injection Vulnerability in DrayTek Vigor2960 Firmware
CVE-2026-113390

9.4CRITICAL

Key Information:

Vendor

Draytek
Status
Vigor2960
Vendor
CVE Published:
20 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-113390?

A significant vulnerability has been identified in the DrayTek Vigor2960 firmware version 1.5.1.6. This issue resides in a function within the CGI Interface, specifically sub_182B0 in the file /cgi-bin/mainfunction.cgi. By manipulating certain arguments, such as usefile, uscript, or option, an attacker may carry out os command injection attacks remotely. This vulnerability compromises affected products, which are no longer supported with regular updates, increasing the risk of exploitation. The vendor has urged users to upgrade to the more secure version 1.5.1.7, which addresses various security concerns, but notes that the Vigor2960 is now classified as End of Support (EoS) with only major vulnerabilities receiving potential fixes.

Affected Version(s)

Vigor2960 1.5.1.6 Revision 8218

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-2026-113390 - Proof of Concept

References

https://vuldb.com/vuln/422666
vdb-entrytechnical-description
https://vuldb.com/vuln/422666/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-113390
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
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
.