CISA KEV · Known exploitedHigh

CVE-2021-26828

OpenPLC ScadaBR

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
EPSS
39.4%
98.5% percentile
CISA KEV
Listed
Published
2021.06.11
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability39.4%
Technical severityCVSS 8.8

Vulnerability overview

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.

Affected product and versions

Product
OpenPLC ScadaBR
Affected versions
<= 0.9.1, <= 1.12.4
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA 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.

Due date: 2025.12.24
  1. 1
    Identify

    Confirm that OpenPLC ScadaBR and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-434
KEV added
2025.12.03
Ransomware use
미확인
CVE-2021-26828 — OpenPLC ScadaBR | SECUFOCUS NOW