CVE-2025-40938
criticalA vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1).
Vendor / product: Siemens — simatic cn 4100 firmware
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.
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2025-12-09 16:17
Modified: 2026-10-23 22:10
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 07:06 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
siemens / simatic_cn_4100_firmware <4.0.1
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://cert-portal.siemens.com/productcert/html/ssa-416652.html
References
- https://cert-portal.siemens.com/productcert/html/ssa-416652.html productcert@siemens.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:06 UTC · record ↗