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CVE-2021-26828

HighPublished

OpenPLC ScadaBR Unrestricted Upload of File with Dangerous Type Vulnerability

Published: Jun 11, 2021
Updated: Dec 4, 2025
Assigning CNA: mitre
Evidence observed: Dec 3, 2025

Primary CVSS

8.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

39.4%

Moderate · next 30 days

Percentile: 98.6%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows remote authenticated users to upload and execute arbitrary JSP files via view_edit.shtm.

Sources

CVE-2021-26828_ScadaBR_RCEExploit
Proof-of-concept exploit for CVE-2021-26828 enabling authenticated remote code execution on ScadaBR SCADA systems via JSP file upload. Supports Windows and Linux targets with reverse shell payloads.
CVE-2021-26828-UltimateExploit
ScadaFlare Authenticated RCE Exploit Framework for ScadaBR (CVE-2021-26828) OpenPLC ScadaBR

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