Medium severity4.6NVD Advisory· Published Dec 9, 2025· Updated Jun 17, 2026
CVE-2025-40939
CVE-2025-40939
Description
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device contains a USB port which allows unauthenticated connections. This could allow an attacker with physical access to the device to trigger reboot that could cause denial of service condition.
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Affected products
3- cpe:2.3:o:siemens:simatic_cn_4100_firmware:*:*:*:*:*:*:*:*Range: <4.0.1
<V4.0.1+ 1 more
- (no CPE)range: <V4.0.1
- (no CPE)range: 0
Patches
Vulnerability mechanics
References
1- cert-portal.siemens.com/productcert/html/ssa-416652.htmlnvdVendor Advisory
News mentions
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