# CVE-2020-15782 — Siemens SIMATIC Drive Controller family > As of 2026-06-02, CVE-2020-15782 is a CRITICAL-severity vulnerability in Siemens SIMATIC Drive Controller family, CVSS v3.1 9.8, EPSS 5.1% (92.2th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2020-15782, most recently “AI-Powered Attacks Targeting Siemens S7 Series PLCs in U.S. Critical Infrastructure”. **Last updated:** 2026-06-02 ## What is CVE-2020-15782? A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V21.9), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.5.0), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V2.9.2), SIMATIC S7-1500 Software Controller (All versions < V21.9), SIMATIC S7-PLCSIM Advanced (All versions < V4.0), SINAMICS PERFECT HARMONY GH180 Drives (Drives manufactured before 2021-08-13), SINUMERIK MC (All versions < V6.15), SINUMERIK ONE (All versions < V6.15). Affected devices are vulnerable to a memory protection bypass through a specific operation. A remote unauthenticated attacker with network access to port 102/tcp could potentially write arbitrary data and code to protected memory areas or read sensitive data to launch further attacks. The record classifies CVE-2020-15782 under weakness class [CWE-119](https://intel.threadlinqs.com/cwe/CWE-119). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 10 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 1966 days ago. ## Severity and exploitation probability - **CVSS v3.1 base score:** 9.8 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`) - **EPSS (FIRST):** 5.1% probability of exploitation in the next 30 days, higher than 92.2% of all scored CVEs - **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog - **Threadlinqs priority:** 10/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability - **Published:** 2021-05-28, last modified 2026-06-02 ## Is CVE-2020-15782 being exploited? Weaponised exploit code for CVE-2020-15782 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 36 in the Threadlinqs vulnerability feed. - [trickest/cve](https://github.com/trickest/cve/blob/main/2020/CVE-2020-15782.md) (trickest) ## Affected products and versions - [Siemens](https://intel.threadlinqs.com/vendors/siemens): SIMATIC Drive Controller family, SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants), SIMATIC S7-1200 CPU family (incl. SIPLUS variants), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants), SIMATIC S7-1500 Software Controller, SIMATIC S7-PLCSIM Advanced, SINAMICS PERFECT HARMONY GH180 Drives, SINUMERIK MC, SINUMERIK ONE ## How to fix CVE-2020-15782 The record marks a vendor fix as available for CVE-2020-15782. Patch reference: [https://cert-portal.siemens.com/productcert/pdf/ssa-434534.pdf](https://cert-portal.siemens.com/productcert/pdf/ssa-434534.pdf). Vendor advisory: [https://cert-portal.siemens.com/productcert/pdf/ssa-434534.pdf](https://cert-portal.siemens.com/productcert/pdf/ssa-434534.pdf). Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory. ## Threat activity tracking CVE-2020-15782 1 tracked threat in the Threadlinqs corpus references CVE-2020-15782, either in the campaign’s CVE list or as an indicator on the campaign record. - [AI-Powered Attacks Targeting Siemens S7 Series PLCs in U.S. Critical Infrastructure](https://intel.threadlinqs.com/threat/TL-2026-2076) — CRITICAL · 2026-08-19 ## Sources Enriched from CVE.org, NVD, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-10-10. This product uses the NVD API but is not endorsed or certified by the NVD. **Other references** - [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/pdf/ssa-434534.pdf) - [cert-portal.siemens.com (ssa 434536)](https://cert-portal.siemens.com/productcert/pdf/ssa-434536.pdf) - [cert-portal.siemens.com (ssa 434535)](https://cert-portal.siemens.com/productcert/pdf/ssa-434535.pdf) Canonical: https://intel.threadlinqs.com/cve/CVE-2020-15782 Full detection coverage and IOCs for threats exploiting CVE-2020-15782 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp