---
title: "CVE-2026-25939: FUXA Unauthenticated Remote Arbitrary Scheduler Write"
url: https://erroneo.us/security/cve/CVE-2026-25939/
description: "CVE-2026-25939 (fuxa-server (npm)): FUXA is a web-based Process Visualization (SCADA/HMI/Dashboard) software. From 1.2.8 through version 1.2.10, an…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-02-09
date_modified: 2026-02-11
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-25939"
kev: false
cvss: 9.3
epss: 0.00937
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-25939: FUXA Unauthenticated Remote Arbitrary Scheduler Write

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.9% , percentile 60: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 60% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes fuxa-server (npm) >= 1.2.8, < 1.2.11, fixed in 1.2.11 . Check your lockfile, including transitive dependencies.

## What it is

FUXA is a web-based Process Visualization (SCADA/HMI/Dashboard) software. From 1.2.8 through version 1.2.10, 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 has been patched in FUXA version 1.2.11.

## Affected packages

- npm `fuxa-server` >= 1.2.8, < 1.2.11 → fixed: 1.2.11

## Affected products (CVE record)

- frangoteam FUXA: < 1.2.11

## Severity

- GitHub_M CVSS 4.0: 9.3 `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`
- GitHub CVSS 4.0: 9.3 `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`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.94% probability of exploitation activity in the next 30 days; percentile 60.

## Sources

- [GitHub Advisory GHSA-c869-jx4c-q5fc](https://github.com/advisories/GHSA-c869-jx4c-q5fc)
- [CVE.org record CVE-2026-25939](https://www.cve.org/CVERecord?id=CVE-2026-25939)
- [NVD entry CVE-2026-25939](https://nvd.nist.gov/vuln/detail/CVE-2026-25939)
- [github.com](https://github.com/frangoteam/FUXA/security/advisories/GHSA-c869-jx4c-q5fc)
- [github.com](https://github.com/frangoteam/FUXA/commit/5782b35117a9bd14ffcb881f8dfb8c6680157d9b)
- [github.com](https://github.com/frangoteam/FUXA/releases/tag/v1.2.11)
- [github.com](https://github.com/frangoteam/FUXA/pull/2174)
- [github.com](https://github.com/frangoteam/FUXA/commit/aced6ad0b6089eea4e5cef51c0a88bf4f308d45f)

---
Source page: https://erroneo.us/security/cve/CVE-2026-25939/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt