CVE-2021-26828 KEV
8.8
HIGH · CVSS 3.1 · EPSS 39.4% (pctl 99)
Patch first
On CISA KEV — known exploited in the wild, due 2025-12-24.
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.
Scoring
| CVSS | 8.8 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 39.36% — more likely to be exploited than 99% of all CVEs |
| Weakness | CWE-434 |
| On CISA KEV | yes — remediate by 2025-12-24 |
| Public exploit | none known |
| Published | 2021-06-11 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | OpenPLC ScadaBR Unrestricted Upload of File with Dangerous Type Vulnerability |
|---|---|
| Added | 2025-12-03 |
| Due | 2025-12-24 |
| Vendor / product | OpenPLC / ScadaBR |
| Ransomware use | none reported |
Affected (3)
| Vendor | Product |
|---|---|
| linux | linux kernel |
| microsoft | windows |
| scadabr | scadabr |
References
- http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4
- http://packetstormsecurity.com/files/162564/ScadaBR-1.0-1.1CE-Linux-Shell-Upload.html
- https://youtu.be/k1teIStQr1A
- http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4
- http://packetstormsecurity.com/files/162564/ScadaBR-1.0-1.1CE-Linux-Shell-Upload.html
- https://youtu.be/k1teIStQr1A
- https://github.com/SCADA-LTS/Scada-LTS/pull/2174
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26828
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