Medium · 4.9 CVE-2025-11847 EUVD-2025-207553GHSA-qhmq-843h-9vq8

A null pointer dereference vulnerability in the IP settings CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9.6)C…

Published Feb 24, 2026 · Updated Feb 24, 2026 · Assigned by Zyxel

Vendor: Zyxel Product: VMG3625-T50B firmware Product: WX3100-T0 firmware Category: Network devices

Description

A null pointer dereference vulnerability in the IP settings CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9.6)C0 and the Zyxel WX3100-T0 firmware versions through 5.50(ABVL.4.8)C0 could allow an authenticated attacker with administrator privileges to trigger a denial-of-service (DoS) condition by sending a crafted HTTP request.

Affected products

Vendor	Product	Affected	Fixed
Zyxel	VMG3625-T50B firmware	<= 5.50(ABPM.9.6)C0	—
Zyxel	WX3100-T0 firmware	<= 5.50(ABVL.4.8)C0	—

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-null-pointer-dereference-and-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-security-routers-and-wireless-extenders-02-24-2026 vendor-advisory