Siemens SIMOTICS CONNECT 400 (Update A)

Summary

Vulnerabilities 4

• Medium 6.5
  CVE-2020-27736

  A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethe…

  Siemens APOGEE PXC Modular (BACnet) TALON TC Compact (BACnet) APOGEE PXC Compact (P2 Ethernet) ICS / OT
  Apr 22, 2021
• Medium 6.5
  CVE-2020-27737

  A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethe…

  Siemens APOGEE PXC Compact (P2 Ethernet) APOGEE PXC Modular (P2 Ethernet) TALON TC Modular (BACnet) ICS / OT
  Apr 22, 2021
• Medium 6.5
  CVE-2020-27738

  A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethe…

  Siemens TALON TC Modular (BACnet) APOGEE PXC Compact (BACnet) APOGEE PXC Modular (BACnet) ICS / OT
  Apr 22, 2021
• Medium 5.3
  CVE-2021-25677

  A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethe…

  Siemens TALON TC Modular (BACnet) APOGEE PXC Compact (BACnet) APOGEE PXC Modular (BACnet) ICS / OT
  Apr 22, 2021

Revision history

1. 2025-05-06 #3

   Revision - Fixing typos

2. 2022-03-08 #2

   Added solution for CVE-2021-25677

3. 2021-04-13 #1

   Publication Date

References

• SSA-669158: DNS Client Vulnerabilities in SIMOTICS CONNECT 400 - TXT Version
  https://cert-portal.siemens.com/productcert/txt/ssa-669158.txt
• SSA-669158: DNS Client Vulnerabilities in SIMOTICS CONNECT 400 - PDF Version
  https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf
• ICS Advisory ICSA-21-103-13 - Web Version
  https://www.cisa.gov/news-events/ics-advisories/icsa-21-103-13
• Recommended Practices
  https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
• Recommended Practices
  https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
• Recommended Practices
  https://www.cisa.gov/topics/industrial-control-systems
• Recommended Practices
  https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
• Recommended Practices
  https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
• Recommended Practices
  https://www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B