OpenPLC — known exploited vulnerabilities
The CISA Known Exploited Vulnerabilities catalog (KEV) lists vulnerabilities that CISA has confirmed are being exploited in the wild; U.S. federal civilian agencies are required to remediate each entry by its due date. This page joins the KEV entries for OpenPLC with NVD CVSS scores and CISA's ransomware-campaign flag. See our methodology or browse all CVEs.
Key findings
CISA's Known Exploited Vulnerabilities catalog lists 2 OpenPLC vulnerabilities confirmed as exploited in the wild across 1 product; none are currently flagged as used in known ransomware campaigns. All entries affect a single product: ScadaBR. CISA added 2 entries in 2025, compared with 0 in 2024. Across the 2 entries with an NVD CVSS score (100% of the total), the average score is 7.1; none is rated critical by NVD. The most recent addition is CVE-2021-26828 (OpenPLC ScadaBR Unrestricted Upload of File with Dangerous Type Vulnerability), added on 2025-12-03.
Affected products
| Product | Entries | Share |
|---|---|---|
| ScadaBR | 2 | 100% |
Entries added per year
By date added to the KEV catalog
Exploited OpenPLC vulnerabilities (2)
Newest first. CVSS scores from NVD where available.
| CVE | Product | Vulnerability | Date added | Ransomware | CVSS |
|---|---|---|---|---|---|
| CVE-2021-26828 | ScadaBR | OpenPLC ScadaBR Unrestricted Upload of File with Dangerous Type Vulnerability | 2025-12-03 | — | HIGH8.8 |
| CVE-2021-26829 | ScadaBR | OpenPLC ScadaBR Cross-site Scripting Vulnerability | 2025-11-28 | — | MEDIUM5.4 |
Source: CISA Known Exploited Vulnerabilities catalog, joined with NIST NVD CVSS data. Vendor names are normalized across spellings. Compare all vendors.