Is CVE-2021-26828 actively exploited?

CVE-2021-26828 has no public evidence of in-the-wild exploitation as of 2025-12-04.

What is the CVSS score for CVE-2021-26828?

CVE-2021-26828 has a CVSS score of 8.8 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2021-26828?

Patch guidance is available from scadabr security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-26828.

Which products are affected by CVE-2021-26828?

2 products: scadabr scadabr, scadabr scadabr.

Fix CVE-2021-26828 - HIGH scadabr scadabr

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-434 · Unrestricted File Upload CWE-434 · Unrestricted File Upload

Metadata

Primary Vendor: SCADABR
Published: 6/11/2021
Last Modified: 12/4/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-26828

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary