CVE-2026-1459 Command injection in VMG3625-T50B firmware
An authenticated administrator can execute arbitrary OS commands via the certificate download CGI program in Zyxel VMG3625-T50B firmware.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1459?
CVE-2026-1459 is a high-severity command injection vulnerability in Zyxel VMG3625-T50B firmware, published on 24 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-1459?
It affects 6 products.
Products include Zyxel Dx5401-B1 Firmware, Zyxel Emg3525-T50b Firmware, Zyxel Emg5523-T50b Firmware, Zyxel Vmg3625-T50b Firmware, Zyxel Vmg3625-T50c Firmware, Zyxel Vmg8623-T50b Firmware.
How do I fix CVE-2026-1459?
No fix has been published for CVE-2026-1459 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-1459 being exploited?
There is no known exploitation of CVE-2026-1459 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-x6c4-87pg-m84f.