Read the docs
TI-2023-13570 Aliases CVE-2023-29131GHSA-3q3j-5m7x-chq6

Incorrect default permissions in Siemens SIMATIC CN 4100

Priority MEDIUM 43CWE-276Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00423 36th percentileScored 2026-11-07
Fix Fixed SIMATIC CN 4100 (Siemens): V2.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SiemensSIMATIC CN 4100before V2.5V2.5Patch availableCNA
  • SIMATIC CN 4100 VendorSiemens Affected before V2.5 Fixed in V2.5 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:siemens:simatic_cn_4100_firmware:*:*:*:*:*:*:*:*before 2.5VulnerableSiemens
  • cpe:2.3:o:siemens:simatic_cn_4100_firmware:*:*:*:*:*:*:*:* Versions before 2.5 Vulnerable ·Siemens

Remediation

  • Fix · CNA SIMATIC CN 4100 (Siemens) Fixed in V2.5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-29131
  2. 2026-10-03 Alias added: GHSA-3q3j-5m7x-chq6

References

Patch 1

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-23989 crypto: algif_aead - Revert to operating out-of-place KEVCVSS 3.1HIGH 7.8
  • TI-2024-21620 A vulnerability has been identified in SIMATIC CN 4100 (All versions < V3.0). CVSS 3.1CRITICAL 10.0
  • TI-2023-27102 A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.7). CVSS 3.1CRITICAL 9.8
  • TI-2024-21619 Hard-coded credentials in Siemens SIMATIC CN 4100 CVSS 3.1CRITICAL 9.8
  • TI-2026-18410 Resource allocation without limits in Siemens SIMATIC CN 4100 CVSS 4.0HIGH 8.7
See all 19 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences