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Vulnerability record · CVE-2020-15782 · published 28 May 2021

CVE-2020-15782: Siemens simatic driver controller firmware memory buffer overflow vulnerability

Siemens · Simatic Driver Controller Firmware

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.

9.8 CVSS 3.1 Critical EPSS 5.2% · top 7.8% CWE-119 · Memory buffer overflow
9.8CVSS 3.1 base score, v2 7.5
5.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-434534.pdf PatchVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-434535.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-434536.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-434534.pdf PatchVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-434535.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-434536.pdf

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Source: NIST National Vulnerability Database (record CVE-2020-15782), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.