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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 31 Jul 2026 11:00:00 +0000

Type Values Removed Values Added
Title Multicast Flood Causing Memory Exhaustion in Siemens SIMATIC S7-PLCSIM Advanced

Thu, 23 Jul 2026 03:30:00 +0000

Type Values Removed Values Added
Title Multicast Flood Causing Memory Exhaustion in Siemens SIMATIC S7-PLCSIM Advanced

Mon, 20 Jul 2026 23:00:00 +0000

Type Values Removed Values Added
Title Denial of Service via Multicast Flood in Siemens SIMATIC S7-PLCSIM Advanced

Thu, 16 Jul 2026 08:00:00 +0000

Type Values Removed Values Added
Title Denial of Service via Multicast Flood in Siemens SIMATIC S7-PLCSIM Advanced

Tue, 14 Jul 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 14 Jul 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Siemens
Siemens simatic S7-plcsim Advanced
Vendors & Products Siemens
Siemens simatic S7-plcsim Advanced

Tue, 14 Jul 2026 10:00:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'}

cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: siemens

Published:

Updated: 2026-07-14T12:15:38.712Z

Reserved: 2026-06-15T10:05:28.879Z

Link: CVE-2026-54429

cve-icon Vulnrichment

Updated: 2026-07-14T12:15:24.219Z

cve-icon NVD

Status : Deferred

Published: 2026-07-14T10:16:33.123

Modified: 2026-07-15T20:27:37.663

Link: CVE-2026-54429

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-31T10:45:04Z

Weaknesses