Home › Exploited CVEs › CVE-2021-26828
CVE-2021-26828: OpenPLC ScadaBR Unrestricted Upload of File with Dangerous Type Vulnerability
OpenPLC ScadaBR · in CISA KEV since 2025-12-03
2025-12-03added to KEV
2025-12-24federal remediation due date
39.36%EPSS exploit probability (30 days) 98.5th percentile
8.8 HIGHCVSS 3.1
Unknownknown ransomware use
1,636days from NVD publication to KEV
What it is
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 (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-434 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2021-06-11 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-26828.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.