CVE-2025-40570

Severity: low (CVSS 2.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-08-12 · updated 2026-06-17
Weakness: CWE-770

Description

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
Siemens SIPROTEC 5 7SX85 (CP300): before V10.0 — fixed in V10.0
Siemens SIPROTEC 5 7SY82 (CP150): before V10.0 — fixed in V10.0
Siemens SIPROTEC 5 7UM85 (CP300): from V7.80 before V10.0 — fixed in V10.0
Siemens SIPROTEC 5 7UT82 (CP150): before V10.0 — fixed in V10.0
Siemens SIPROTEC 5 7UT85 (CP300): from V7.80 before V10.0 — fixed in V10.0

How to fix

Upgrade to a fixed version: Siemens SIPROTEC 5 6MD84 (CP300) V10.0; Siemens SIPROTEC 5 6MD85 (CP300) V10.0; Siemens SIPROTEC 5 6MD86 (CP300) V10.0; Siemens SIPROTEC 5 6MD89 (CP300) V10.0; Siemens SIPROTEC 5 6MU85 (CP300) V10.0; Siemens SIPROTEC 5 7KE85 (CP300) V10.0; Siemens SIPROTEC 5 7SA82 (CP150) V10.0; Siemens SIPROTEC 5 7SA86 (CP300) V10.0; Siemens SIPROTEC 5 7SA87 (CP300) V10.0; Siemens SIPROTEC 5 7SD82 (CP150) V10.0; Siemens SIPROTEC 5 7SD86 (CP300) V10.0; Siemens SIPROTEC 5 7SD87 (CP300) V10.0. Check the vendor advisory for mitigations.

References

https://cert-portal.siemens.com/productcert/html/ssa-894058.html

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