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CVE-2026-22924

Quick assessment

Affected
Siemens SIMATIC CN 4100
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 CN 4100是德国西门子（Siemens）公司的一个通信节点。 Siemens SIMATIC CN 4100 V5.0之前版本存在访问控制错误漏洞，该漏洞源于未正确限制未经验证的连接，可能导致资源耗尽。

CVSS 9.1 · Critical EPSS 0.30% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
Siemens SIMATIC CN 4100 < V5.0 affected
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I. Basic Information for CVE-2026-22924

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 CN 4100 (All versions < V5.0). The affected application does not properly restrict unauthenticated connections and is susceptible to resource exhaustion conditions. This could allow an attacker to disrupt normal operations or perform unauthorized actions, potentially impacting system availability and integrity.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Siemens SIMATIC CN 4100 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens SIMATIC CN 4100是德国西门子（Siemens）公司的一个通信节点。 Siemens SIMATIC CN 4100 V5.0之前版本存在访问控制错误漏洞，该漏洞源于未正确限制未经验证的连接，可能导致资源耗尽。
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 CN 4100 0 ~ V5.0 -

II. Public POCs for CVE-2026-22924

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III. Intelligence Information for CVE-2026-22924

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Vendor Advisories for CVE-2026-22924 (1)

Same Patch Batch · Siemens · 2026-05-12 · 20 CVEs total

CVE-2025-40949 9.1 CRITICAL Siemens多款产品 操作系统命令注入漏洞
CVE-2026-25786 9.1 CRITICAL Siemens多款产品 跨站脚本漏洞
CVE-2026-25787 9.1 CRITICAL Siemens SIMATIC 跨站脚本漏洞
CVE-2026-41551 9.1 CRITICAL Siemens ROS# 安全漏洞
CVE-2025-40946 8.3 HIGH Siemens多款产品 安全漏洞
CVE-2025-12659 7.8 HIGH Heap-based buffer overflow in Siemens Simcenter Femap
CVE-2026-44412 7.8 HIGH Siemens Solid Edge 安全漏洞
CVE-2026-44411 7.8 HIGH Siemens Solid Edge 缓冲区错误漏洞
CVE-2026-27662 7.7 HIGH Siemens SIMATIC HMI Comfort Panels 安全漏洞
CVE-2025-40833 7.5 HIGH Siemens多款产品 代码问题漏洞
CVE-2025-40947 7.5 HIGH Siemens RUGGEDCOM 操作系统命令注入漏洞
CVE-2026-22925 7.5 HIGH Siemens SIMATIC CN 4100 安全漏洞
CVE-2026-33893 7.5 HIGH Siemens多款产品 信任管理问题漏洞
CVE-2026-33862 7.3 HIGH Siemens Teamcenter 跨站脚本漏洞
CVE-2026-25789 7.1 HIGH Siemens多款产品 跨站脚本漏洞
CVE-2025-40948 6.8 MEDIUM Siemens多款产品 参数注入漏洞
CVE-2026-41125 6.0 MEDIUM Siemens多款产品 SQL注入漏洞
CVE-2024-54017 5.3 MEDIUM Siemens SIPROTEC 5 安全漏洞
CVE-2026-42177 5.3 MEDIUM linux-entra-sso: PRT SSO cookie can leak to attacker-controlled hosts when broad host perm

IV. Related Vulnerabilities

Same product: SIMATIC CN 4100
Same vendor: Siemens
Same weakness: CWE-306

V. Comments for CVE-2026-22924

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