8.9

CVE-2025-4106: watchguard fireware os Active Debug Code

CVSS: 8.9v4.0HighDeferred
Published 24-10-2025Last modified 08-08-2026
Open JSON

Vulnerability summary

CVE-2025-4106 is a high (CVSS 8.9) Active Debug Code vulnerability in watchguard fireware os. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.9% of scored vulnerabilities.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.9/10
010
High · v4.0 (CVE.org)
EPSS score
0.32%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 24-10-2025
    PublishedVulnerability first disclosed.
  2. 08-08-2026
    Last modifiedVulnerability information updated.

Description

An authenticated admin user with access to both the management WebUI and command line interface on a Firebox can enable a diagnostic debug shell by uploading a platform and version-specific diagnostic package and executing a leftover diagnostic command.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

24%

Versus all other CVEs

30-day change

+0.02 pp

From 0.30% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.32%

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

Watchguard1 product

1 vendor · 1 product

References

2 links