CVE-2025-40570 describes a vulnerability in numerous Siemens SIPROTEC 5 devices across various models and versions, where insufficient bandwidth limitation on the local USB port allows for a denial-of-service attack. An attacker with physical access can send specially crafted, high-bandwidth packets, causing the device to exhaust its memory and become unresponsive via the USB port, leading to an automatic reset. The vulnerability has a low severity CVSS score of 2.4, indicating a low attack complexity and impact, as it requires physical access and only results in temporary unavailability of the USB port without affecting protection functions. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| Siemens | SIPROTEC 5 6MD84 (CP300) | >= 0, < V10.0CNA affecteddefault unknown | |
| Siemens | SIPROTEC 5 6MD85 (CP300) | >= V7.80, < V10.0CNA affecteddefault unknown | |
| Siemens | SIPROTEC 5 6MD86 (CP300) | >= V7.80, < V10.0CNA affecteddefault unknown | |
| Siemens | SIPROTEC 5 6MD89 (CP300) | >= V7.80, < V10.0CNA affecteddefault unknown | |
| Siemens | SIPROTEC 5 6MU85 (CP300) | >= V7.80, < V10.0CNA affecteddefault unknown |
CVSS version used by this source: 4.0
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.0 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.