High 8.8Known exploited (CISA KEV)Published Jun 11, 2021

CVE-2021-26828OpenPLC 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.

Updated under an hour ago (2026-10-19 04:50 UTC)

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It affects scadabr. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Dec 3, 2025; federal agencies had to remediate by Dec 24, 2025. Treat that date as your deadline.

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Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-434
Known exploited: Added to CISA KEV Dec 3, 2025; federal remediation due Dec 24, 2025Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 39.36% (percentile 99)
Assigned by: mitre
NVD analysis: Analyzed
Record last updated: Dec 4, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

scadabr scadabr scadabr:scadabr	through 0.9.1; through 1.12.4	NVD

References

https://youtu.be/k1teIStQr1Ax-refsource-misc, exploit, third-party-advisory
http://packetstormsecurity.com/files/162564/ScadaBR-1.0-1.1CE-Linux-Shell-Upload.htmlx-refsource-misc, exploit, third-party-advisory
http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4x-refsource-misc, broken-link, exploit, vendor-advisory
https://github.com/SCADA-LTS/Scada-LTS/pull/2174issue-tracking, patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26828us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.