← Vulnerability feed

Vulnerability record · CVE-2023-29131 · published 11 July 2023

CVE-2023-29131: Siemens simatic cn 4100 firmware incorrect default permissions vulnerability

Siemens · Simatic Cn 4100 Firmware

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.

10.0 CVSS 3.1 Critical EPSS 0.42% · top 65.8% CWE-276 · Incorrect default permissions
10.0CVSS 3.1 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-313488.pdf PatchVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-313488.pdf PatchVendor Advisory

Track CVE-2023-29131 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-39682Linux kernel TLS zero-length record handling flaw on rx_listThe Linux kernel TLS receive path mishandles zero-length records that arrive from the rx_list, breaking the assumption that a record type change cann…KEVEPSS 2.9%analysed7.8CVE-2026-31431Linux kernel algif_aead in-place crypto operation flawThe Linux kernel's algif_aead AF_ALG AEAD interface operated in-place on buffers that come from different mappings, a flaw the fix resolves by revert…KEVEPSS 3.4%analysed10.0CVE-2024-32741Siemens simatic cn 4100 firmware hard-coded password vulnerabilityA vulnerability has been identified in SIMATIC CN 4100 (All versions < V3.0). The affected device contains hard coded password which is used for the …EPSS 0.63%10.0CVE-2023-29130Siemens simatic cn 4100 firmware improper access control vulnerabilityA vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.5). Affected device consists of improper access controls in the configurati…EPSS 0.56%9.8CVE-2024-32740Siemens simatic cn 4100 firmware hard-coded credentials vulnerabilityA vulnerability has been identified in SIMATIC CN 4100 (All versions < V3.0). The affected device contains undocumented users and credentials. An att…EPSS 0.70%9.8CVE-2023-49621Siemens simatic cn 4100 firmware vulnerabilityA vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.7). The "intermediate installation" system state of the affected applicatio…EPSS 0.60%9.2CVE-2025-40938Siemens simatic cn 4100 firmware hard-coded credentials vulnerabilityA vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device stores sensitive information in the firmware. Thi…EPSS 0.38%8.8CVE-2026-22924Siemens simatic cn 4100 firmware missing authentication for critical function vulnerabilityA vulnerability has been identified in SIMATIC CN 4100 (All versions < V5.0). The affected application does not properly restrict unauthenticated con…EPSS 0.30%

Source: NIST National Vulnerability Database (record CVE-2023-29131), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.