What’s Vulnerable › Vulnerabilities

CVE-2020-25242

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-12 · updated 2026-06-17
• Weakness: CWE-400

Description

A vulnerability has been identified in SIMATIC NET CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Standard (incl. SIPLUS variants) (All versions). Specially crafted packets sent to TCP port 102 could cause a Denial-of-Service condition on the affected devices. A cold restart might be necessary in order to recover.

Affected products

• Siemens Simatic Net Cp 343-1 Advanced Firmware: all versions
• Siemens Simatic Net Cp 343-1 Lean Firmware: all versions
• Siemens Simatic Net Cp 343-1 Standard Firmware: all versions

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-676775.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-676775.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-676775.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-676775.pdf
• https://us-cert.cisa.gov/ics/advisories/icsa-21-131-07
• https://cert-portal.siemens.com/productcert/pdf/ssa-676775.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-676775.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-676775.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-676775.pdf
• https://us-cert.cisa.gov/ics/advisories/icsa-21-131-07

Get alerted when CVE-2020-25242 or the next vulnerability affects your stack