What is CVE-2025-11845?

CVE-2025-11845 is a medium-severity vulnerability in Zyxel Ax7501-b1, classified under NULL Pointer Dereference. CVSS score: 4.9/10. Published 2026-02-24.

How severe is CVE-2025-11845?

Medium severity. CVSS v3 base score is 4.9 out of 10.

NULL pointer dereference in Zyxel Ax7501-b1

CVE-2025-11845

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 authe…

EPSS: 0.008 (51.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Affected products

Zyxel Ax7501-b1
Zyxel Ax7501-b1_firmware
Zyxel Dx3300-t0
Zyxel Dx3300-t0_firmware
Zyxel Dx3300-t1
Zyxel Dx3300-t1_firmware
Zyxel Dx3301-t0
Zyxel Dx3301-t0_firmware
Zyxel Dx4510-b0
Zyxel Dx4510-b0_firmware

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

security@zyxel.com.tw (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2025-11845?: CVE-2025-11845 is a medium-severity vulnerability in Zyxel Ax7501-b1, classified under NULL Pointer Dereference. CVSS score: 4.9/10. Published 2026-02-24.
How severe is CVE-2025-11845?: Medium severity. CVSS v3 base score is 4.9 out of 10.