Siemens SIMATIC Process Historian 2020 vulnerabilities

3 CVEs affecting Siemens SIMATIC Process Historian 2020, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2025-30033, published 2025-08-12.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2021-27395, published 2021-10-12. High severity, CVSS 8.1. EPSS: 0.8% chance of exploitation in the next 30 days. A vulnerability has been identified in SIMATIC Process Historian 2013 and earlier (All versions), SIMATIC Process Historian 2014 (All versions < SP3 Update 6), SIMATIC Process Historian 2019 (All…
CVE-2024-35783, published 2024-09-10. Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days. A vulnerability has been identified in SIMATIC BATCH V9.1 (All versions), SIMATIC Information Server 2020 (All versions < V2020 SP2 Update 5), SIMATIC Information Server 2022 (All versions < V2022…
CVE-2025-30033, published 2025-08-12. High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days. The affected setup component is vulnerable to DLL hijacking. This could allow an attacker to execute arbitrary code when a legitimate user installs an application that uses the affected setup…