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CVE-2026-54429

Quick assessment

Affected
Siemens SIMATIC S7-PLCSIM Advanced
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Siemens simatic s7-plcsim advanced是德国Siemens公司的一款高级可编程控制器仿真工具。 Siemens simatic s7-plcsim advanced存在资源管理错误漏洞，该漏洞源于未正确处理高容量组播网络流量，可能导致本地网络段上未经身份验证的攻击者耗尽可用内存资源，从而造成拒绝服务。以下版本受到影响：所有版本。

CVSS 7.4 · High EPSS 0.27% · P17

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
Siemens SIMATIC S7-PLCSIM Advanced < * affected
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I. Basic Information for CVE-2026-54429

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Siemens simatic s7-plcsim advanced 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens simatic s7-plcsim advanced是德国Siemens公司的一款高级可编程控制器仿真工具。 Siemens simatic s7-plcsim advanced存在资源管理错误漏洞，该漏洞源于未正确处理高容量组播网络流量，可能导致本地网络段上未经身份验证的攻击者耗尽可用内存资源，从而造成拒绝服务。以下版本受到影响：所有版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Siemens SIMATIC S7-PLCSIM Advanced 0 ~ * -

II. Public POCs for CVE-2026-54429

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III. Intelligence Information for CVE-2026-54429

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Vendor Advisories for CVE-2026-54429 (1)

Same Patch Batch · Siemens · 2026-07-14 · 3 CVEs total

CVE-2026-56451 10.0 CRITICAL Siemens Opcenter X 加密问题漏洞
CVE-2025-40945 6.7 MEDIUM Siemens COMOS 权限许可和访问控制问题漏洞

IV. Related Vulnerabilities

Same vendor: Siemens
Same weakness: CWE-770

V. Comments for CVE-2026-54429

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