What is CVE-2026-54429?

CVE-2026-54429 is a high-severity vulnerability in Siemens Simatic S7-plcsim Advanced, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.4/10. Published 2026-07-14.

How severe is CVE-2026-54429?

High severity. CVSS v3 base score is 7.4 out of 10.

Resource exhaustion in Siemens Simatic S7-plcsim Advanced

CVE-2026-54429

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…

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Siemens Simatic S7-plcsim Advanced — versions 0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

productcert@siemens.com

Frequently asked questions

What is CVE-2026-54429?: CVE-2026-54429 is a high-severity vulnerability in Siemens Simatic S7-plcsim Advanced, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.4/10. Published 2026-07-14.
How severe is CVE-2026-54429?: High severity. CVSS v3 base score is 7.4 out of 10.