CVE-2021-26828VulnerabilityPublished 12/03/2025Updated 10/24/2026
CVE-2021-26828: OpenPLC ScadaBR Unrestricted Upload of File with Dangerous Type Vulnerability
Affects OpenPLC ScadaBRSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 12/03/2025
- KEV deadline
- 12/24/2025
- EPSS
- 39.1% chance of exploitation in 30 days – higher than 98% of CVEs
What to do
CISA 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.
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.