CVE-2026-25939

CRITICAL

FUXA Unauthenticated Remote Arbitrary Scheduler Write

Published February 10, 2026Updated February 10, 2026Source: osv

Summary

### Summary An authorization bypass vulnerability in the FUXA allows an unauthenticated, remote attacker to create and modify arbitrary schedulers, exposing connected ICS/SCADA environments to follow-on actions. This vulnerability affects FUXA version 1.2.8 through version 1.2.10. This has been patched in FUXA version 1.2.11. ### Impact This affects all deployments, including those with `runtime.settings.secureEnabled` set to `true`. Exploitation allows an unauthenticated, remote attacker to automatically authenticate as guest and create, modify or delete schedules. These schedules can be configured to trigger immediately or cyclically, forcing connected devices to specific states or values, or executing existing scripts on the server. ### Patches This issue has been patched in FUXA version 1.2.11. Users are strongly encouraged to update to the latest available release.

Remediation

Upgrade to the fixed version using your package manager.

npm

Update fuxa-server to 1.2.11 or later

npm install fuxa-server@1.2.11

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Package	Ecosystem	Affected	Fixed In
fuxa-server	npm	All versions	1.2.11

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-862
Missing AuthorizationMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 10.0 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

—

Confidentiality

—

Integrity

—

Availability

—

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H

References

Frequently Asked Questions

What is CVE-2026-25939?: FUXA Unauthenticated Remote Arbitrary Scheduler Write This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 10.0/10).
How do I check if my project is affected by CVE-2026-25939?: CVE-2026-25939 affects fuxa-server. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-25939 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

10.0

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-c869-jx4c-q5fc

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