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7.2

Zyxel VMG3625-T50B Firmware Command Injection Flaw Allows Admin Access

CVE-2026-1459 · published 8 months ago
Summary

The Zyxel VMG3625-T50B's certificate download feature has a security flaw that could let someone with administrator access on the device use it to run unauthorized commands on the device. This could allow them to make changes or access sensitive information they shouldn't have. Update the firmware to the latest version to fix this issue.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
zyxel vmg8623-t50b_firmware <= 5.50\(abpm.9.7\)c0
cpe:2.3:o:zyxel:vmg8623-t50b_firmware:*:*:*:*:*:*:*:*
zyxel dx5401-b1_firmware <= 5.17\(abyo.7.1\)c0
cpe:2.3:o:zyxel:dx5401-b1_firmware:*:*:*:*:*:*:*:*
zyxel emg3525-t50b_firmware <= 5.50\(abpm.9.7\)c0
cpe:2.3:o:zyxel:emg3525-t50b_firmware:*:*:*:*:*:*:*:*
zyxel emg5523-t50b_firmware <= 5.50\(abpm.9.7\)c0
cpe:2.3:o:zyxel:emg5523-t50b_firmware:*:*:*:*:*:*:*:*
zyxel vmg3625-t50b_firmware <= 5.50\(abpm.9.7\)c0
cpe:2.3:o:zyxel:vmg3625-t50b_firmware:*:*:*:*:*:*:*:*
zyxel vmg3625-t50c_firmware <= 5.50\(abpm.9.7\)c0
cpe:2.3:o:zyxel:vmg3625-t50c_firmware:*:*:*:*:*:*:*:*
Original advisory text
A post-authentication command injection vulnerability in the TR-369 certificate download CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9.7)C0 could allow an authenticate...
A post-authentication command injection vulnerability in the TR-369 certificate download CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9.7)C0 could allow an authenticated attacker with administrator privileges to execute operating system (OS) commands on an affected device.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
7.2 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-78OS Command Injection
Timeline
Published24 Feb 2026
Updated31 Oct 2026
First seen6 Mar 2026
Sources
CVE-2026-1459 · NVD
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