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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 versi...

Published: Jun 9, 2026Updated: Jul 23, 2026 Sources: CVE List NVD csafCWE-434
6.1MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 91.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

SIPROTEC 5 is vulnerable to arbitrary file uploads by authenticated users using the DIGSI 5 protocol. This could allow an attacker to upload malicious configuration files, potentially causing a permanent denial of service condition. As a mitigation measure, users of the CP050 and CP150 device models are advised to upgrade to version 9.90 or later. For CP300 device models, devices 7ST85 and 7ST86 are advised to upgrade to version 10.00 or later, while the remaining models should upgrade to version 9.90 or later. These versions introduce an allow-list feature that restricts arbitrary file uploads and reduces the risk associated with this vulnerability. Siemens is preparing fix versions and recommends specific countermeasures for products where fixes are not, or not yet available.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:AAC:LPR:HUI:NS:UC:NI:HA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-434

Affected Products

Siemens
commercial·DEaka siemens ag
SIPROTEC 5 6MD84 (CP300)
ICS / OT / IoT
SIPROTEC 5 6MD85 (CP200)
ICS / OT / IoT
SIPROTEC 5 6MD85 (CP300)
ICS / OT / IoT
SIPROTEC 5 6MD86 (CP200)
ICS / OT / IoT
SIPROTEC 5 6MD86 (CP300)
ICS / OT / IoT
SIPROTEC 5 6MD89 (CP300)
ICS / OT / IoT
SIPROTEC 5 6MU85 (CP300)
ICS / OT / IoT
SIPROTEC 5 7KE85 (CP200)
ICS / OT / IoT
and 53 more affected products View all →

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

3 techniques
Command and Control
Initial Access
Persistence
View detailed technique mapping

References

https://cert-portal.siemens.com/productcert/csaf/ssa-139483.json
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-139483.html
cert-portal.siemens.com
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-174-02.json
raw.githubusercontent.com
and 10 more references View all →

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