CVE-2026-113390
9.9CriticalPublished 20 Oct 2026 · NVD status: Received · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Impact
- Full C/I/A compromise
- Weakness
- CWE-77, CWE-78
Impact
Authenticated remote attackers can execute arbitrary OS commands with full system compromise. They require network access to the router's web management interface and low-privileged credentials.
Root cause
Improper input sanitization of the usefile, usescript, and option arguments in /cgi-bin/mainfunction.cgi leads to OS command injection.
Affected systems
DrayTek Vigor2960 version 1.5.1.6 Revision 8218 (device is End of Support).
CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Fix & remediation
Upgrade firmware to version 1.5.1.7 or retire the unsupported device. As an immediate mitigation, disable remote WAN access to the web management interface and restrict administrative access to trusted internal IP addresses only.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
A flaw has been found in DrayTek Vigor2960 1.5.1.6 Revision 8218. Affected by this issue is the function sub_182B0 of the file /cgi-bin/mainfunction.cgi of the component CGI Interface. This manipulation of the argument usefile/usescript/option causes os command injection. Remote exploitation of the attack is possible. The exploit has been published and may be used. 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.