Null Pointer Dereference Vulnerability in Zyxel VMG3625-T50B and WX3100-T0 Firmware
CVE-2025-11847

4.9MEDIUM

Key Information:

Vendor

Zyxel
Status
Vmg3625-t50b Firmware
Wx3100-t0 Firmware
Vendor
CVE Published:
24 February 2026

What is CVE-2025-11847?

A null pointer dereference vulnerability exists in the IP settings CGI program of the Zyxel VMG3625-T50B and WX3100-T0 firmware. An authenticated attacker with administrative privileges can exploit this vulnerability by sending a specially crafted HTTP request. This could lead to a denial-of-service condition, interrupting the normal operation of the device and impacting users.

Affected Version(s)

VMG3625-T50B firmware <= 5.50(ABPM.9.6)C0

WX3100-T0 firmware <= 5.50(ABVL.4.8)C0

References

https://www.zyxel.com/global/en/support/security-advisori...
vendor-advisory

CVSS V3.1

Score:
4.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.