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Vulnerability record · CVE-2020-15796 · published 14 December 2020

CVE-2020-15796: Siemens simatic et 200sp open controller firmware vulnerability

Siemens · Simatic Et 200sp Open Controller Firmware

A vulnerability has been identified in SIMATIC ET 200SP Open Controller (incl. SIPLUS variants) (V20.8), SIMATIC S7-1500 Software Controller (V20.8). The web server of the affected products contains a vulnerability that could allow a remote attacker to trigger a denial-of-service condition by sending a specially crafted HTTP request.

7.5 CVSS 3.1 High EPSS 1.6% · top 25.0% CWE-248 · CWE-248
7.5CVSS 3.1 base score, v2 5.0
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A vulnerability has been identified in SIMATIC ET 200SP Open Controller (incl. SIPLUS variants) (V20.8), SIMATIC S7-1500 Software Controller (V20.8). The web server of the affected products contains a vulnerability that could allow a remote attacker to trigger a denial-of-service condition by sending a specially crafted HTTP request.

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

Affected products

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

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-700697.pdf Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-700697.pdf Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-15796), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.