Arbitrary file upload in Siemens Siprotec 5 6md84 (Cp300)

CVE-2025-40808

A vulnerability has been identified in SIPROTEC 5 6MD84 (CP300) (All versions), SIPROTEC 5 6MD85 (CP200) (All versions), SIPROTEC 5 6MD85 (CP300) (All versions), SIPROTEC 5 6MD86 (CP200) (All versions), SIPROTEC 5 6MD86 (CP300) (All versio…

Vulnerability class: Unrestricted File Upload

EPSS: 0.002 (8.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-40808?
CVE-2025-40808 is a medium-severity vulnerability in Siemens Siprotec 5 6md84 (Cp300), classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.1/10. Published 2026-06-09.
How severe is CVE-2025-40808?
Medium severity. CVSS v3 base score is 6.1 out of 10.