# CVE-2021-26828

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.

- Page: https://www.vulneraibility.com/cve/CVE-2021-26828
- CVSS: 8.8
- Known exploited: yes, in CISA KEV since 2025-12-03; CISA due date 2025-12-24
- EPSS: 39.10%
- Unvetted proof-of-concept code on GitHub: 3 GitHub proofs of concept (first 2021-03-31)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-12-03)
- Weakness: CWE-434
- Published: 2021-06-11

## Affected

- scadabr:scadabr

## References

- [other] https://youtu.be/k1teIStQr1A
- [other] http://packetstormsecurity.com/files/162564/ScadaBR-1.0-1.1CE-Linux-Shell-Upload.html
- [other] http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26828
- [other] https://github.com/SCADA-LTS/Scada-LTS/pull/2174

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.