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CVE Vendors Products Updated CVSS v3.1
CVE-2025-40820 1 Siemens 16 Sidoor Atd430w, Sidoor Ate530s Coated, Simatic and 13 more 2026-04-15 7.5 High
Affected products do not properly enforce TCP sequence number validation in specific scenarios but accept values within a broad range. This could allow an unauthenticated remote attacker e.g. to interfere with connection setup, potentially leading to a denial of service. The attack succeeds only if an attacker can inject IP packets with spoofed addresses at precisely timed moments, and it affects only TCP-based services.