VULNERABILITY INTELLIGENCE

CVE-2020-15791

CVSS score6.5 MEDIUM
EPSS probability0.71%
CISA KEVNot currently listed
Published2020-09-09
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

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.

Weakness classification

  • productcert@siemens.com: CWE-522
  • nvd@nist.gov: CWE-522

Primary references