CVE-2026-54429: CWE-770: Allocation of Resources Without Limits or Throttling in Siemens SIMATIC S7-PLCSIM Advanced
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.
AI Analysis
Technical Summary
This vulnerability (CWE-770) in Siemens SIMATIC S7-PLCSIM Advanced involves allocation of resources without limits or throttling. When subjected to high-volume multicast network traffic, the affected application exhausts available memory, leading to a denial-of-service condition. An unauthenticated attacker on the local network segment can exploit this if a specific project configuration is active. The application becomes inaccessible until manually restarted. No data loss occurs. No patch or official remediation has been disclosed as of the publication date.
Potential Impact
Successful exploitation results in a denial-of-service condition causing the SIMATIC S7-PLCSIM Advanced application to become inaccessible and require a manual restart. There is no loss of project data. The vulnerability does not affect confidentiality or integrity but impacts availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider limiting exposure to multicast traffic on the local network segment and restrict access to trusted users to reduce risk. Monitor Siemens advisories for updates.
CVE-2026-54429: CWE-770: Allocation of Resources Without Limits or Throttling in Siemens SIMATIC S7-PLCSIM Advanced
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.
CVSS v3.1
Score 7.4high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-770) in Siemens SIMATIC S7-PLCSIM Advanced involves allocation of resources without limits or throttling. When subjected to high-volume multicast network traffic, the affected application exhausts available memory, leading to a denial-of-service condition. An unauthenticated attacker on the local network segment can exploit this if a specific project configuration is active. The application becomes inaccessible until manually restarted. No data loss occurs. No patch or official remediation has been disclosed as of the publication date.
Potential Impact
Successful exploitation results in a denial-of-service condition causing the SIMATIC S7-PLCSIM Advanced application to become inaccessible and require a manual restart. There is no loss of project data. The vulnerability does not affect confidentiality or integrity but impacts availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider limiting exposure to multicast traffic on the local network segment and restrict access to trusted users to reduce risk. Monitor Siemens advisories for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- siemens
- Date Reserved
- 2026-06-15T10:05:28.879Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a56095968715ace4346dd91
Added to database: 07/14/2026, 10:03:05 UTC
Last enriched: 07/14/2026, 10:17:36 UTC
Last updated: 07/14/2026, 12:48:12 UTC
Views: 6
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