CVE-2025-40570: Siemens Siprotec 5 6md84 CP300

Low severity, CVSS 2.4. EPSS: 0.2% chance of exploitation in the next 30 days.

A vulnerability has been identified in SIPROTEC 5 6MD84 (CP300) (All versions < V10.0), SIPROTEC 5 6MD85 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 6MD86 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 6MD89 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 6MU85 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7KE85 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7SA82 (CP150) (All versions < V10.0), SIPROTEC 5 7SA86 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7SA87 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7SD82 (CP150) (All versions < V10.0), SIPROTEC 5 7SD86 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7SD87 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7SJ81 (CP150) (All versions < V10.0), SIPROTEC 5 7SJ82 (CP150) (All versions < V10.0), SIPROTEC 5 7SJ85 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7SJ86 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7SK82 (CP150) (All versions < V10.0), SIPROTEC 5 7SK85 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7SL82 (CP150) (All versions < V10.0), SIPROTEC 5 7SL86 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7SL87 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7SS85 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7ST85 (CP300) (All versions < V10.0), SIPROTEC 5 7ST86 (CP300) (All versions < V10.0), SIPROTEC 5 7SX82 (CP150) (All versions < V10.0), SIPROTEC 5 7SX85 (CP300) (All versions < V10.0), SIPROTEC 5 7SY82 (CP150) (All versions < V10.0), SIPROTEC 5 7UM85 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7UT82 (CP150) (All versions < V10.0), SIPROTEC 5 7UT85 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7UT86 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7UT87 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7VE85 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7VK87 (CP300) (All versions >= V7.80 < V10.0), SIPROTEC 5 7VU85 (CP300) (All versions < V10.0), SIPROTEC 5 Compact 7SX800 (CP050) (All versions < V10.0). Affected devices do not properly limit the bandwidth for incoming network packets over their local USB port. This could allow an attacker with physical access to send specially crafted packets with high bandwidth to the affected devices thus forcing them to exhaust their memory and stop responding to any network traffic via the local USB port. Affected devices reset themselves automatically after a successful attack. The protection function is not affected of this vulnerability.

Affected products

Siemens Siprotec 5 6md84 CP300: before V10.0 (fixed in V10.0)
Siemens Siprotec 5 6md85 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 6md86 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 6md89 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 6mu85 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7ke85 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sa82 CP150: before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sa86 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sa87 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sd82 CP150: before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sd86 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sd87 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sj81 CP150: before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sj82 CP150: before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sj85 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sj86 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sk82 CP150: before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sk85 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sl82 CP150: before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sl86 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sl87 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7ss85 CP300: from V7.80, before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7st85 CP300: before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7st86 CP300: before V10.0 (fixed in V10.0)
Siemens Siprotec 5 7sx82 CP150: before V10.0 (fixed in V10.0)
and 11 more

Published 2025-08-12. Last modified 2026-06-17.