CVE-2016-8673: Siemens SIMATIC CP 343-1 Firmware

High severity, CVSS 8.8. EPSS: 1.1% chance of exploitation in the next 30 days.

A vulnerability has been identified in SIMATIC CP 343-1 Advanced (incl. SIPLUS NET variant) (All versions < V3.0.53), SIMATIC CP 443-1 Advanced (incl. SIPLUS NET variant) (All versions < V3.2.17), SIMATIC S7-300 PN/DP CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP CPU family (incl. SIPLUS variants) (All versions). The integrated web server at port 80/TCP or port 443/TCP of the affected devices could allow remote attackers to perform actions with the permissions of an authenticated user, provided the targeted user has an active session and is induced to trigger the malicious request.

Affected products

• Siemens SIMATIC CP 343-1 Firmware: affected versions not specified
• Siemens SIMATIC CP 443-1 Firmware: affected versions not specified
• Siemens SIMATIC s7 300 CPU Firmware: affected versions not specified
• Siemens SIMATIC s7 400 CPU Firmware: affected versions not specified

Published 2016-11-23. Last modified 2026-06-17.