What is CVE-2025-11848?

CVE-2025-11848 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-2025-11848?

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

NULL pointer dereference in Zyxel Ax7501-B1

CVE-2025-11848

A null pointer dereference vulnerability in the Wake-on-LAN CGI program of the Zyxel VMG3625-T50B firmware version 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.

Published 2026-02-24 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.019 (79.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.019 · change: +0.001

Affected products

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2025-11848?: CVE-2025-11848 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-2025-11848?: Medium severity. CVSS v3 base score is 4.9 out of 10.