CVSS 3.1 Score 7.5 of 10 (high)


Published Feb 13, 2024
CWE ID 940


CVE-2023-51440 is a vulnerability that affects SIMATIC CP 343-1, SIMATIC CP 343-1 Lean, SIPLUS NET CP 343-1, and SIPLUS NET CP 343-1 Lean. These products incorrectly validate TCP sequence numbers, which can allow an unauthenticated remote attacker to create a denial of service condition by injecting spoofed TCP RST packets. The vulnerability has a base severity rating of HIGH and a base score of 7.5 according to the CVSS v3.1 scoring system. It does not require any privileges or user interaction to exploit and has a low attack complexity. The impact score is 3.6, indicating the potential danger it poses to organizations. To remediate this vulnerability, users should apply the necessary patches or updates provided by Siemens, the vendor of the affected products.


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