4.9

CVE-2025-11846: zyxel ax7501-b1_firmware NULL Pointer Dereference

CVSS: 4.9v3.1MediumAnalyzed
Published 24-02-2026Last modified 24-02-2026
Open JSON

Vulnerability summary

CVE-2025-11846 is a medium (CVSS 4.9) NULL Pointer Dereference vulnerability in zyxel ax7501-b1_firmware. EPSS estimates a 1.19% chance of exploitation in the next 30 days, higher than 67.6% of scored vulnerabilities.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
4.9/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.19%
0%100%
Low · +0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 24-02-2026
    PublishedVulnerability first disclosed.
  2. 24-02-2026
    Last modifiedVulnerability information updated.

Description

A null pointer dereference vulnerability in the account settings 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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.19%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

+0.07 pp

From 1.12% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Zyxel56 products

1 vendor · 56 products

References

1 links