CVE-2026-22924: CWE-306: Missing Authentication for Critical Function in Siemens SIMATIC CN 4100
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.
AI Analysis
Technical Summary
This vulnerability (CWE-306) affects Siemens SIMATIC CN 4100 versions before 5.0 by failing to restrict unauthenticated access to critical functions. An attacker can exploit this to cause resource exhaustion, leading to denial of service or unauthorized actions that compromise system integrity and availability. The CVSS v3.1 score is 9.1, indicating a critical severity with network attack vector, no privileges required, and no user interaction needed. No patch or official remediation level is currently documented.
Potential Impact
The vulnerability allows unauthenticated attackers to connect to the affected system and potentially exhaust resources, disrupting normal operations. This can result in denial of service and unauthorized actions that affect system integrity and availability. Confidentiality impact is not indicated. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the Siemens vendor advisory for current remediation guidance. Until a fix is available, consider restricting network access to the affected system to trusted sources only and monitor for unusual connection attempts. Do not assume the vulnerability is mitigated without official confirmation.
CVE-2026-22924: CWE-306: Missing Authentication for Critical Function in Siemens SIMATIC CN 4100
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.
CVSS v3.1
Score 9.1critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-306) affects Siemens SIMATIC CN 4100 versions before 5.0 by failing to restrict unauthenticated access to critical functions. An attacker can exploit this to cause resource exhaustion, leading to denial of service or unauthorized actions that compromise system integrity and availability. The CVSS v3.1 score is 9.1, indicating a critical severity with network attack vector, no privileges required, and no user interaction needed. No patch or official remediation level is currently documented.
Potential Impact
The vulnerability allows unauthenticated attackers to connect to the affected system and potentially exhaust resources, disrupting normal operations. This can result in denial of service and unauthorized actions that affect system integrity and availability. Confidentiality impact is not indicated. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the Siemens vendor advisory for current remediation guidance. Until a fix is available, consider restricting network access to the affected system to trusted sources only and monitor for unusual connection attempts. Do not assume the vulnerability is mitigated without official confirmation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- siemens
- Date Reserved
- 2026-01-13T15:21:45.768Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a02f117cbff5d8610c13a61
Added to database: 05/12/2026, 09:21:27 UTC
Last enriched: 05/19/2026, 09:44:58 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 57
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