CVE-2021-26828

8.8 HIGH CISA KEV - Actively Exploited

Published: June 11, 2021 Modified: December 04, 2025

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4

Source: cve@mitre.org

Broken Link Exploit Vendor Advisory

http://packetstormsecurity.com/files/162564/ScadaBR-1.0-1.1CE-Linux-Shell-Upload.html

Source: cve@mitre.org

Exploit Third Party Advisory

https://youtu.be/k1teIStQr1A

Source: cve@mitre.org

Exploit Third Party Advisory

http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4

Source: af854a3a-2127-422b-91ae-364da2661108

Broken Link Exploit Vendor Advisory

http://packetstormsecurity.com/files/162564/ScadaBR-1.0-1.1CE-Linux-Shell-Upload.html

Source: af854a3a-2127-422b-91ae-364da2661108

Exploit Third Party Advisory

https://youtu.be/k1teIStQr1A

Source: af854a3a-2127-422b-91ae-364da2661108

Exploit Third Party Advisory

https://github.com/SCADA-LTS/Scada-LTS/pull/2174

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Issue Tracking Patch

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26828

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

8 reference(s) from NVD

Quick Stats

CVSS v3 Score

8.8 / 10.0

EPSS (Exploit Probability)

80.0%

99th percentile

Exploitation Status

Actively Exploited

Remediation due: 2025-12-24

Weaknesses (CWE)

CWE-434 CWE-434

Affected Vendors

scadabr linux microsoft

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