CVE-2023-29131
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.5). Affected device consists of an incorrect default value in the SSH configuration. This could allow an attacker to bypass...
Affects 1 product across 2 vendors.
Software sets overly permissive default access rights during installation or resource creation.
Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.
A critical vulnerability has been identified in all versions of SIMATIC CN 4100 prior to V2.5, which involves an incorrect default value in the SSH configuration. This can potentially allow attackers to bypass network isolation, leading to severe impacts on confidentiality, integrity, and availability.
BSID: BS-2023-GLOBAL-350284-C • Model: Qwen/Qwen2.5-72B-Instruct-AWQ • Confidence: HIGH
Is this CVE in your environment?
BreachSpider monitors your ICS/OT environment for vulnerabilities like this one. No agents or network access required. Free to start.
Check My Environment →What is CVE-2023-29131?
What is the CVSS score for CVE-2023-29131?
Is CVE-2023-29131 actively exploited?
How do I remediate CVE-2023-29131?
What systems are affected by CVE-2023-29131?
What NERC-CIP standard applies to CVE-2023-29131?
What IEC 62443 requirement maps to CVE-2023-29131?
| CVE ID | CVE-2023-29131 |
|---|---|
| BSID | BS-2023-GLOBAL-350284-C BreachSpider Global ID |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| Published | 2023-07-11 |
| Last Modified | 2026-02-18 |
| ICS Relevance | 80% |
| Weakness (CWE) | |
| Verticals | |
| Source | NVD |
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.5). Affected device consists of an incorrect default value in the SSH configuration. This could allow an attacker to bypass network isolation.
Source: NIST NVD / MITRE CVE Database
The vulnerability can be exploited remotely without authentication, requiring low skill level. An attacker can leverage the incorrect default value in the SSH configuration to bypass network isolation mechanisms, gaining unauthorized access to the affected device and potentially the entire network.
Exploitation Likelihood: MEDIUM
| Vendor | Product | Fixed Version |
|---|---|---|
| Fujitsu-Siemens | — | — |
| Siemens | Simatic Cn 4100 Firmware | — |
No patch URL on record. Monitor vendor security advisories directly.
| CISA KEV | Not in KEV catalog |
|---|---|
| Public Exploit | Not confirmed |
| PoC Code | Not confirmed |
Implement strict network segmentation and monitor SSH traffic for unusual activity. Ensure that only authorized users have access to the affected devices.
No reliable network detection signature exists for this vulnerability class — apply the compensating controls above and the vendor patch. SAGE only publishes a network rule when a concrete on-the-wire signature can be grounded in the advisory.
This CVE violates CIP-007-R2 as it allows unauthorized access to the control system, compromising the security of the electronic security perimeter.
This CVE maps to SR 7.6 because it involves a misconfiguration that can be exploited to bypass network isolation, which is a critical security control in IEC 62443.
Virtual patch generated by CITED Relevance SAGE. Validate in isolated environment before production deployment. Compensating control only - does not replace vendor patch.
SAGE Enrichment Record — provenance & audit hash
| Model | Qwen/Qwen2.5-72B-Instruct-AWQ |
|---|---|
| Confidence | HIGH |
| Enriched At | 2026-05-24 |
| SHA-512 Audit Hash | 5a8daf5e0b7115ed08c5aec7082962595a956c8a03db1fc33419340220f46e3818394617eb862f1726a07abdb2d49a22ddc58fd88d76dffeb49f8d00e4e74ae6 |
Critical Severity - Know Your Exposure
A CVSS 10.0 vulnerability in your ICS environment cannot wait. BreachSpider maps critical CVEs to your specific assets and tells you what to fix first.
Check Your Assets Free →