Home › Exploited CVEs › CVE-2021-26829
CVE-2021-26829: OpenPLC ScadaBR Cross-site Scripting Vulnerability
OpenPLC ScadaBR · in CISA KEV since 2025-11-28
2025-11-28added to KEV
2025-12-19federal remediation due date
48.05%EPSS exploit probability (30 days) 98.8th percentile
5.4 MEDIUMCVSS 3.1
Unknownknown ransomware use
1,631days from NVD publication to KEV
What it is
OpenPLC ScadaBR contains a cross-site scripting vulnerability via system_settings.shtm.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-79 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD published | 2021-06-11 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-26829.json · all KEV CVEs
Kevscope: daily CISA KEV + EPSS datasetThe whole KEV catalog joined with daily EPSS and CVSS scores as CSV/Parquet, refreshed daily. Free to download.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.