CVE-2021-26828
KEVOpenPLC ScadaBR Unrestricted Upload of File with Dangerous Type Vulnerability
Description
OpenPLC ScadaBR contains an unrestricted upload of file with dangerous type vulnerability that allows remote authenticated users to upload and execute arbitrary JSP files via view_edit.shtm.
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 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HPublishedJun 11, 2021
Last modifiedJun 17, 2026
Added to KEVDec 3, 2025
Remediation dueDec 24, 2025
References
- forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4Broken LinkExploit
- packetstormsecurity.com/files/162564/ScadaBR-1.0-1.1CE-Linux-Shell-Upload.htmlExploitThird Party Advisory
- youtu.be/k1teIStQr1AExploitThird Party Advisory
- github.com/SCADA-LTS/Scada-LTS/pull/2174Issue TrackingPatch
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26828US Government Resource
0 recent articles mention this CVE
78
Risk assessment · High
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 307 days
- CVSS
- 8.8 HIGH
- EPSS (30-day exploit probability)
- 39.1% · top 1% of all CVEs
- Weakness
- CWE-434
- Attack vector
- Network, remotely reachable
Recommended actions
- 1.Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.