CVE-2026-22925: CWE-770: Allocation of Resources Without Limits or Throttling in Siemens SIMATIC CN 4100
CVE-2026-22925 is a high-severity vulnerability in Siemens SIMATIC CN 4100 versions prior to V5.0. It involves allocation of resources without limits or throttling, making the system susceptible to resource exhaustion when subjected to a high volume of TCP SYN packets. This can lead to denial-of-service (DoS) conditions by overwhelming system resources and rendering the service unavailable. No official patch or remediation guidance has been provided yet. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability (CWE-770) affects Siemens SIMATIC CN 4100 devices running versions earlier than V5.0. The issue arises from the system's failure to limit or throttle resource allocation when processing TCP SYN packets, allowing an attacker to flood the device with such packets. This results in resource exhaustion and denial-of-service conditions. The CVSS v3.1 score is 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability.
Potential Impact
Successful exploitation can cause denial-of-service by exhausting system resources, leading to service unavailability. There is no impact on confidentiality or integrity reported. No known exploits have been observed in the wild so far.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider implementing network-level protections such as SYN flood mitigation or rate limiting on upstream devices to reduce the risk of resource exhaustion attacks targeting the SIMATIC CN 4100.
CVE-2026-22925: CWE-770: Allocation of Resources Without Limits or Throttling in Siemens SIMATIC CN 4100
Description
CVE-2026-22925 is a high-severity vulnerability in Siemens SIMATIC CN 4100 versions prior to V5.0. It involves allocation of resources without limits or throttling, making the system susceptible to resource exhaustion when subjected to a high volume of TCP SYN packets. This can lead to denial-of-service (DoS) conditions by overwhelming system resources and rendering the service unavailable. No official patch or remediation guidance has been provided yet. There are no known exploits in the wild at this time.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-770) affects Siemens SIMATIC CN 4100 devices running versions earlier than V5.0. The issue arises from the system's failure to limit or throttle resource allocation when processing TCP SYN packets, allowing an attacker to flood the device with such packets. This results in resource exhaustion and denial-of-service conditions. The CVSS v3.1 score is 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability.
Potential Impact
Successful exploitation can cause denial-of-service by exhausting system resources, leading to service unavailability. There is no impact on confidentiality or integrity reported. No known exploits have been observed in the wild so far.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider implementing network-level protections such as SYN flood mitigation or rate limiting on upstream devices to reduce the risk of resource exhaustion attacks targeting the SIMATIC CN 4100.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- siemens
- Date Reserved
- 2026-01-13T15:21:45.769Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a02f117cbff5d8610c13a64
Added to database: 05/12/2026, 09:21:27 UTC
Last enriched: 05/19/2026, 10:56:55 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 49
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