Read the docs
TI-2023-26894 Aliases CVE-2023-49252GHSA-qv7h-cgx5-jj9m

Improper input validation in Siemens SIMATIC CN 4100

Priority MEDIUM 40CWE-20Published · Updated

Key facts

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

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

Summary

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.7). The affected application allows IP configuration change without authentication to the device. This could allow an attacker to cause denial of service condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00567 47th percentileScored 2026-11-07
Fix Fixed SIMATIC CN 4100 (Siemens): V2.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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 V2.7V2.7Patch availableCNA
  • SIMATIC CN 4100 VendorSiemens Affected before V2.7 Fixed in V2.7 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:siemens:simatic_cn_4100_firmware:*:*:*:*:*:*:*:*before 2.7VulnerableSiemens
cpe:2.3:h:siemens:simatic_cn_4100:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
  • cpe:2.3:o:siemens:simatic_cn_4100_firmware:*:*:*:*:*:*:*:* Versions before 2.7 Vulnerable ·Siemens
  • cpe:2.3:h:siemens:simatic_cn_4100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens

Remediation

  • Fix · CNA SIMATIC CN 4100 (Siemens) Fixed in V2.7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-49252
  2. 2026-10-03 Alias added: GHSA-qv7h-cgx5-jj9m

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