What’s Vulnerable › Vulnerabilities

CVE-2020-15791

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-09-09 · updated 2026-06-17
• Weakness: CWE-522

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.

Affected products

• Siemens Simatic S7-300 Cpu 312 Firmware: all versions
• Siemens Simatic S7-300 Cpu 314 Firmware: all versions
• Siemens Simatic S7-300 Cpu 315-2 Dp Firmware: all versions
• Siemens Simatic S7-300 Cpu 315-2 Pn Firmware: all versions
• Siemens Simatic S7-300 Cpu 315F-2 Dp Firmware: all versions
• Siemens Simatic S7-300 Cpu 315F-2 Pn Firmware: all versions
• Siemens Simatic S7-300 Cpu 317-2 Dp Firmware: all versions
• Siemens Simatic S7-300 Cpu 317-2 Pn Firmware: all versions
• Siemens Simatic S7-300 Cpu 317F-2 Dp Firmware: all versions
• Siemens Simatic S7-300 Cpu 317F-2 Pn Firmware: all versions
• Siemens Simatic S7-400 Cpu 412 Firmware: all versions
• Siemens Simatic S7-400 Cpu 414 Firmware: all versions
• Siemens Simatic S7-400 Cpu 416 Firmware: all versions
• Siemens Simatic S7-400 Cpu 417 Firmware: all versions

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf

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