CVE-2025-27394

HighRCE

Published: 11 March 2025

Published

11 March 2025

Modified

22 August 2025

KEV Added

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Patch

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CVSS Score 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0262 85.8th percentile

Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-27394 is a high-severity OS Command Injection (CWE-78) vulnerability in Siemens Scalance Lpe9403 Firmware. Its CVSS base score is 7.2 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 14.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploitation for Privilege Escalation (T1068) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Directly requires sanitization and validation of user input when creating SNMP users to prevent OS command injection.

SI-2 Flaw Remediation good match

prevent

Mandates timely flaw remediation through patching to V4.0 or later, which addresses the improper input sanitization vulnerability.

AC-6 Least Privilege partial match

prevent

Enforces least privilege to minimize high-privilege accounts that could exploit the SNMP user creation input vulnerability.

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation

Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.

attack.mitre.org →

T1059.004 Unix Shell Execution

Adversaries may abuse Unix shell commands and scripts for execution.

attack.mitre.org →

Why these techniques?

OS command injection (CWE-78) enables authenticated high-priv remote attacker to achieve arbitrary code execution and full device compromise, directly mapping to exploitation for privilege escalation (T1068) and Unix shell command execution (T1059.004).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

NVD Description

A vulnerability has been identified in SCALANCE LPE9403 (6GK5998-3GS00-2AC2) (All versions < V4.0). Affected devices do not properly sanitize user input when creating new SNMP users. This could allow an authenticated highly-privileged remote attacker to execute arbitrary code on the…

device.

Deeper analysisAI

CVE-2025-27394 affects Siemens SCALANCE LPE9403 devices (order number 6GK5998-3GS00-2AC2) in all versions prior to V4.0. The vulnerability arises from improper sanitization of user input when creating new SNMP users, classified as CWE-78 (OS Command Injection). It carries a CVSS v3.1 base score of 7.2 (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to potential impacts on confidentiality, integrity, and availability.

An authenticated remote attacker with high privileges can exploit this vulnerability over the network with low attack complexity and no user interaction required. Exploitation enables arbitrary code execution on the device, allowing full compromise of the affected SCALANCE LPE9403.

Mitigation details are provided in the Siemens security advisory at https://cert-portal.siemens.com/productcert/html/ssa-075201.html. Affected devices should be updated to version V4.0 or later to address the issue.