PT-2026-58003 · Siemens · Simatic S7-Plcsim Advanced

Published 2026-07-14 · Updated 2026-07-14 · CVE-2026-54429

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions SIMATIC S7-PLCSIM Advanced (affected versions not specified)

Description An issue exists where the application fails to properly handle high-volume multicast network traffic, leading to the exhaustion of available memory resources. This allows an unauthenticated attacker on the local network segment to trigger a denial-of-service condition, rendering the application inaccessible and requiring a manual restart. No project data is lost during this event. Successful exploitation depends on a specific project configuration being active on the targeted instance.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-54429

Affected Products

Simatic S7-Plcsim Advanced

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-54429 · Security Note
• https://cert-portal.siemens.com/productcert/html/ssa-828211.html · Note
• https://twitter.com/CVEnew/status/2076980578600043003 · Twitter Post