CVE-2026-54429 – SIMATIC S7-PLCSIM Advanced Denial of Service Vulnerability

CVE ID :CVE-2026-54429

Published : July 14, 2026, 10:16 a.m. | 1 hour, 14 minutes ago

Description :A vulnerability has been identified in SIMATIC S7-PLCSIM Advanced (All versions). Affected devices do not properly handle high-volume multicast network traffic, which can exhaust available memory resources in the affected application. This could allow an unauthenticated attacker on the local network segment to cause a denial-of-service condition of the affected application. The affected application becomes inaccessible and requires a manual restart; no project data is lost. Successful exploitation requires a specific project configuration to be already active on the targeted instance.

Severity: 7.4 | HIGH

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