CVE-2024-40890KEV · OVERDUECWE-78

Zyxel DSL CPE OS Command Injection Vulnerability

High · published February 4, 2025

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 8.8. It is confirmed in active exploitation. It sits in the 97.5th percentile for exploit probability.

600
days past CISA
deadline
CVSS v3.1
8.8
EPSS
21%
Percentile
97.5
In the wild
Confirmed
What it is

⚡ A crafty HTTP POST request is the entire exploit! An authenticated attacker can run OS commands on your Zyxel DSL device with just a few keystrokes. 🔥 Think of it as a restaurant where the staff trusts anyone with a staff badge to step into the kitchen. If an employee decides to whip up something foul, they can ruin the entire menu! With this CVE, the ramifications are huge! An attacker could gain control over the device, executing arbitrary commands that could compromise your entire network — stealing data, manipulating settings, or even launching further attacks from your premises. Yikes!

Put simply

Think of it as a restaurant where the staff trusts anyone with a staff badge to step into the kitchen. If an employee decides to whip up something foul, they can ruin the entire menu! This post-authentication command injection vulnerability exists in the CGI program of the Zyxel VMG4325-B10A firmware. By sending crafted HTTP POST requests, attackers can execute unauthorized OS commands on the device, bypassing authentication protections.

What to do

With this CVE, the ramifications are huge! An attacker could gain control over the device, executing arbitrary commands that could compromise your entire network — stealing data, manipulating settings, or even launching further attacks from your premises. Yikes! To safeguard your network, it's crucial to upgrade to the latest firmware version immediately. Regularly check for updates and consider implementing additional network security measures to restrict access to these devices. 🛡️ You’ve got this! Follow these steps, and you’ll boost your security in no time! 💪✨

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.20703 · 97.5th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2025-02-04T09:55Z
KEV added
2025-02-11 · due 2025-03-04
EPSS history
Timeline
  • 11 FEB 00:00Z
    Added to CISA KEV — remediate by Mar 4
    kev
  • 04 FEB 09:55Z
    **UNSUPPORTED WHEN ASSIGNED** A post-authentication command injection vulnerability in the CGI program of the legacy DSL CPE Zyxel VMG4325-B10A firmware…
    cvelistv5