CVE-2021-26828

scadabr

Published 11 Jun 2021 · updated 17 Jun 2026 · Analyzed

8.8 High · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 3 Dec 2025, with a remediation deadline of 24 Dec 2025 for US federal agencies.

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 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.

References

forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4 · Broken Link, Exploit, Vendor Advisory
packetstormsecurity.com/files/162564/ScadaBR-1.0-1.1CE-Linux-Shell-Upload.html · Exploit, Third Party Advisory
youtu.be/k1teIStQr1A · Exploit, Third Party Advisory
github.com/SCADA-LTS/Scada-LTS/pull/2174 · Issue Tracking, Patch
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26828 · US Government Resource