CVE intelligence and bounded remediation

CVE-2020-15791 — A vulnerability has been identified in SIMATIC S7-300 CPU family (incl

Medium CVSS 6.5

A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINUMERIK 840D sl (All versions). The authentication protocol between a client and a PLC via port 102/tcp (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials.

Severity
Medium
CVSS
6.5 (3.1)
Published
2020-09-09
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-522

Affected products

  • siemens / simatic_s7-300_cpu_312_firmware
  • siemens / simatic_s7-300_cpu_314_firmware
  • siemens / simatic_s7-300_cpu_315-2_dp_firmware
  • siemens / simatic_s7-300_cpu_315-2_pn_firmware
  • siemens / simatic_s7-300_cpu_317-2_pn_firmware
  • siemens / simatic_s7-300_cpu_317-2_dp_firmware

Showing 6 representative product identities from 14 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Information disclosure and sensitive data exposure

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace sensitive data through responses, errors, logs, metrics, traces, caches, exports, files, backups, and client bundles.
  • Identify affected subjects, tenants, retention windows, access controls, and downstream copies without opening unnecessary sensitive records.
  • Review metadata, timing, status, length, and existence signals as well as direct content disclosure.

Remediate safely

  • Minimize collection and output, apply field-level authorization and redaction at a centralized boundary, and return generic external errors.
  • Remove secrets and sensitive data from logs, artifacts, URLs, caches, and client-side bundles; rotate credentials that may have been exposed.
  • Update the affected component and add synthetic-data tests for response, error, observability, and export paths.

Authoritative sources

Complete CVE record and remediation plan

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