CVE-2021-26828
OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows remote authenticated...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-26828- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-434
- Updated
- 2026-11-02
CVE List
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.
- Record
CVE-2021-26828- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-434
- Updated
- 2026-11-02
EUVDEUVD-2021-13613
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.
- Record
EUVD-2021-13613- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-j87g-5g8x-jjxc
OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows remote authenticated...
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.
- Record
GHSA-j87g-5g8x-jjxc- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-434
- Updated
- 2026-11-02
CISA KEV No score
OpenPLC ScadaBR Unrestricted Upload of File with Dangerous Type Vulnerability
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.
- Record
CVE-2021-26828- Weakness
- CWE-434
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | hev0x/CVE-2021-26828_ScadaBR_RCE | 2021-03-31 |
| PoC in GitHub | ridpath/CVE-2021-26828-Ultimate | 2025-05-30 |
| PoC in GitHub | h002733/CVE-2021-26828 | 2026-10-09 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation, exploits | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-26828 is a high vulnerability (CVSS 8.8) in Openplc Scadabr, published June 11, 2021. CISA lists it as known to be exploited, since December 3, 2025. EUVD reports exploitation since December 3, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 39.1%, the 98th percentile. No source names a fixed version.
References
youtu.be/k1teIStQr1A
packetstormsecurity.com/files/162564/ScadaBR-1.0-1.1CE-Linux-Shell-Upload.html
forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26828
github.com/SCADA-LTS/Scada-LTS/pull/2174
nvd.nist.gov/vuln/detail/CVE-2021-26828