December 3, 2025 · Applied Cybernetics Group
CVE-2021-26828 — OpenPLC ScadaBR
OpenPLC ScadaBR Unrestricted Upload of File with Dangerous Type Vulnerability
- Added to KEV
2025-12-03- Federal due date
2025-12-24- Vendor
- OpenPLC
- Product
- ScadaBR
- EPSS
- 99.1th percentile (score 0.784, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-26828
CISA short description
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.