CVE-2024-40890

CVSS 8.8 HIGHEPSS 19.3%● KEVCWE-78

In short

An authenticated attacker can execute arbitrary operating system commands on a Zyxel DSL modem by sending a specially crafted HTTP request. This allows complete control over the device after logging in.

Technical detail

Post-authentication command injection in the CGI program of Zyxel VMG4325-B10A firmware 1.00(AAFR.4)C0_20170615 via crafted HTTP POST requests. Requires valid authentication credentials; successful exploitation enables OS command execution with device privileges.

Summary generated and translated by AI from the official description.

**UNSUPPORTED WHEN ASSIGNED** A post-authentication command injection vulnerability in the CGI program of the legacy DSL CPE Zyxel VMG4325-B10A firmware version 1.00(AAFR.4)C0_20170615 could allow an authenticated attacker to execute operating system (OS) commands on an affected device by sending a crafted HTTP POST request.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Zyxel · VMG4325-B10A firmware

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-40890 https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-and-insecure-default-credentials-vulnerabilities-in-certain-legacy-dsl-cpe-02-04-2025