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Unknown
CVE-2013-6920
Disclosure Date: December 07, 2013 (last updated October 05, 2023)
Siemens SINAMICS S/G controllers with firmware before 4.6.11 do not require authentication for FTP and TELNET sessions, which allows remote attackers to bypass intended access restrictions via TCP traffic to port (1) 21 or (2) 23.
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