What is the CVSS score of CVE-2023-49251?

CVE-2023-49251 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.4%.

Which versions of Simatic Cn 4100 Firmware are affected by CVE-2023-49251?

Organizations using A vulnerability face significant risk from CVE-2023-49251, a IDOR vulnerability rated CVSS 8.8.. A patch is available.

How to fix or mitigate CVE-2023-49251?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Simatic Cn 4100 Firmware CVE-2023-49251

HIGH

Authorization Bypass Through User-Controlled Key (CWE-639)

2024-01-09 productcert@siemens.com

Authentication Bypass Simatic Cn 4100 Firmware

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:34 vuln.today

Patch released

Mar 28, 2026 - 19:34 nvd

Patch available

CVE Published

Jan 09, 2024 - 10:15 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.7). The "intermediate installation" system state of the affected application allows an attacker to add their own login credentials to the device. This allows an attacker to remotely login as root and take control of the device even after the affected device is fully set up.

AnalysisAI

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.7). Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity.

Technical ContextAI

This vulnerability is classified under CWE-639. A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.7). The "intermediate installation" system state of the affected application allows an attacker to add their own login credentials to the device. This allows an attacker to remotely login as root and take control of the device even after the affected device is fully set up. Affected products include: Siemens Simatic Cn 4100 Firmware.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.