CVE-2026-54429

Published Jul 14, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Multicast Flood Causing Memory Exhaustion in Siemens SIMATIC S7-PLCSIM Advanced
Type Values Removed Values Added
Title Multicast Flood Causing Memory Exhaustion in Siemens SIMATIC S7-PLCSIM Advanced
Type Values Removed Values Added
Title Denial of Service via Multicast Flood in Siemens SIMATIC S7-PLCSIM Advanced
Type Values Removed Values Added
Title Denial of Service via Multicast Flood in Siemens SIMATIC S7-PLCSIM Advanced
Type Values Removed Values Added
Metrics ssvc

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

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
siemens
Published
Updated
Jul 14, 2026, 12:15 PM
Reserved
Jun 15, 2026, 10:05 AM
Status
Deferred
Published
Jul 14, 2026, 10:16 AM
Modified
Oct 24, 2026, 9:10 PM