What’s Vulnerable › Vulnerabilities

CVE-2020-15783

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-11-12 · updated 2026-06-17
• Weakness: CWE-400

Description

A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC TDC CPU555 (All versions), SINUMERIK 840D sl (All versions). Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service.

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 Tdc Cpu555 Firmware: all versions
• Siemens Sinumerik 840D Sl Firmware: all versions

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-492828.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-492828.pdf

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