What’s Vulnerable › Vulnerabilities

CVE-2022-50994: DrayTek Vigor 2960 < 1.5.1.4 OS Command Injection via mainfunction.cgi

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-08 · updated 2026-06-17
• Weakness: CWE-78

Description

DrayTek Vigor 2960 firmware versions prior to 1.5.1.4 contain an OS command injection vulnerability in the CGI login handler that allows unauthenticated remote attackers to execute arbitrary commands by injecting shell metacharacters into the formpassword parameter. Attackers can exploit unsanitized input passed to the otp_check.sh script to achieve remote code execution with web server privileges. Exploitation requires knowledge of a valid username and that the target account has MOTP authentication enabled.

Affected products

• DrayTek Vigor 2960: before 1.5.1.4 — fixed in 1.5.1.4

How to fix

Upgrade to a fixed version: DrayTek Vigor 2960 1.5.1.4. Check the vendor advisory for mitigations.

References

• https://www.draytek.co.uk/support/downloads/vigor-2960/older-firmware/firmware-1514?task=download.send&id=2597:readme-v2960-1514&catid=1251
• https://www.draytek.com/about/newsroom/2021/2021/end-of-life-notification-vigor2960
• https://www.vulncheck.com/advisories/draytek-vigor-2960-os-command-injection-via-mainfunction-cgi

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