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Public proof of conceptFix available

CVE-2026-25939

FUXA Unauthenticated Remote Arbitrary Scheduler Write

A public proof of concept exists; no exploitation attested.

  • Published2026-02-09
  • Fixed in1.2.11
  • WeaknessCWE-862

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-02-0923:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-25 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-25939?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-25939?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Frangoteam fuxa
BranchAffectedFixed in
1.2≥ 1.2.8, < 1.2.111.2.11

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Frangoteam fuxa to 1.2.11

Advisories and patches

Detection

read 2026-10-25 00:28 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedmbanyamer/CVE-2026-25939-SCADA-FUXA-Unauthenticated-Remote-Arbitrary
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2026-02-11
  • OpenCVESSVC decisionnone—
  • CNACVSS 4.09.3read 2026-10-23
  • NVDCVSS 3.19.1read 2026-10-23
  • CNAweakness (CWE)CWE-862read 2026-10-23
  • FIRST EPSSEPSS score12.7 %2026-10-25
  • PoC-in-GitHubproof of concept1read 2026-10-25
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS 4.0 vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-02-09
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is CVE-2026-25939?

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.

Is CVE-2026-25939 actively exploited?

Active exploitation of CVE-2026-25939 has not been confirmed. Its EPSS score was 12.7% on 2026-10-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-25939?

CVE-2026-25939 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

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