CVE-2026-54429

Siemens SIMATIC S7-PLCSIM Advanced

CVSS 6 medium · Siemens SIMATIC S7-PLCSIM Advanced · published 2026-07-14

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.

NVD · CVE.org

Coverage 1 source

1. 2026-07-28 CISA Cybersecurity Advisories medium Siemens SIMATIC S7-PLCSIM Advanced

   Siemens SIMATIC S7-PLCSIM Advanced has a vulnerability that could cause a denial of service condition.

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