CVE-2025-40938
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk30th percentile - higher than 30% of all known CVEs
Summary
A vulnerability has been identified in SIMATIC CN 4100 (all versions < V4.0.1) where the device stores sensitive information in the firmware. This could allow an attacker to access and misuse this information.
Risk Assessment
The issue may impact the device's confidentiality, integrity, and availability as attackers could leverage the exposed information for further attacks or disruption.
Recommendation
Update SIMATIC CN 4100 to version V4.0.1 or later to remediate the vulnerability.
Other vulnerabilities in SIMATIC CN 4100
See all- CVE-2026-22924Critical
A vulnerability in SIMATIC CN 4100 (versions prior to V5.0) allows unauthenticated attackers to exhaust resources via unrestricted connections. This can disrupt normal device operations.
- CVE-2026-22925High
A vulnerability in SIMATIC CN 4100 (versions prior to V5.0) allows resource exhaustion via a high volume of TCP SYN packets. An attacker can cause service unavailability and denial-of-service conditions.
- CVE-2025-40941Medium
SIMATIC CN 4100 devices (all versions before V4.0.1) expose server information in their responses. An attacker with network access can gain useful information, increasing the likelihood of targeted attacks.
- CVE-2025-40940Medium
In SIMATIC CN 4100 (all versions < V4.0.1), the application exhibits inconsistent SNMP behavior, such as unexpected service availability and unreliable configuration handling across protocol versions. This could allow an attacker to access sensitive data.
- CVE-2025-40937High
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected application does not properly validate input parameters in its REST API, resulting in improper handling of unexpected arguments. This could allow an authenticated attacker to execute arbitrary code with limited privileges.
Original NVD description (English source)
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device stores sensitive information in the firmware. This could allow an attacker to access and misuse this information, potentially impacting the device’s confidentiality, integrity, and availability.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS