CVE-2025-11845

State: Published
Severity: 4.9 Medium
Published: Feb 24, 2026
Updated: Feb 24, 2026
Reserved: Oct 16, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	4.9 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H	Zyxel

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
VMG3625-T50B firmwareZyxel	<= 5.50(ABPM.9.6)C0Affected
WX3100-T0 firmwareZyxel	<= 5.50(ABVL.4.8)C0Affected

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-02-24-2026vendor-advisory

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