CVE-2025-11845

moderate-risk

Published 2026-02-24

A null pointer dereference vulnerability in the certificate downloader 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.

Do I need to act?

0.13% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 4.9/10 Medium

NETWORK / LOW complexity

Affected Products (20)

Lte3301-Plus Firmware

Nebula Fwa505 Firmware

Nebula Fwa510 Firmware

Nebula Fwa515 Firmware

Nebula Fwa710 Firmware

Ee5301-00 Firmware

Ee3301-00 Firmware

Dx5401-B1 Firmware

Dx4510-B1 Firmware

Dx4510-B0 Firmware

Dx3301-T0 Firmware

Dx3300-T1 Firmware

Dx3300-T0 Firmware

Nebula Lte3301-Plus Firmware

Ee6510-10 Firmware

Emg3525-T50B Firmware

Emg5523-T50B Firmware

Ex2210-T0 Firmware

Ex3300-T0 Firmware

Ex3300-T1 Firmware

Affected Vendors

Zyxel

References (1)

Vendor Advisory https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advis...

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moderate-risk

Severity 20/34 · Moderate

Exploitability 1/34 · Minimal

Exposure 26/34 · High