CVE-2021-26828

HIGH

8.8

CVSS Score

Published: June 11, 2021 at 11:10 AM UTC

Updated: June 17, 2026 at 03:43 AM UTC

1 product affected across 1 vendorScadaBR

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Severity

HIGH8.8

Exploitation

CISA KEV

Exploit prediction

EPSS 39%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score39.1%

EPSS (Exploit Prediction Scoring System) estimates a 39.1% chance this CVE is exploited in the wild within the next 30 days — higher than 99% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

OpenPLC ScadaBR contains an unrestricted upload of file with dangerous type vulnerability that allows remote authenticated users to upload and execute arbitrary JSP files via view_edit.shtm.

Required Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Ransomware Use

Unknown

Added to KEV

Dec 3, 2025

Remediation Due

Dec 24, 2025

312 days overdue

Notes

This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/SCADA-LTS/Scada-LTS/pull/2174

https://nvd.nist.gov/vuln/detail/CVE-2021-26828

Description

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.