CVE-2019-6855

HIGH
7.3
CVSS Score
Published: January 6, 2020 at 10:56 PM UTC
Updated: June 17, 2026 at 02:39 AM UTC
45 products affected across 1 vendorModicon M340 BMXP342020 FirmwareModicon M340 BMXP3420302 FirmwareModicon M340 BMXP341000 Firmware

Using EcoStruxure Control Expert (all versions prior to 14.1 Hot Fix), Unity Pro (all versions), Modicon M340 (all versions prior to V3.20) , and Modicon M580 (all versions prior to V3.10) by N/A?

Get instant alerts when new vulnerabilities affect EcoStruxure Control Expert (all versions prior to 14.1 Hot Fix), Unity Pro (all versions), Modicon M340 (all versions prior to V3.20) , and Modicon M580 (all versions prior to V3.10) - before attackers find them.

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Severity
HIGH7.3
Exploit prediction
EPSS 1.0%

Description

Incorrect Authorization vulnerability exists in EcoStruxure Control Expert (all versions prior to 14.1 Hot Fix), Unity Pro (all versions), Modicon M340 (all versions prior to V3.20) , and Modicon M580 (all versions prior to V3.10), which could cause a bypass of the authentication process between EcoStruxure Control Expert and the M340 and M580 controllers.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 14.114.1
Affected range stops below 14.1, so it looks safe — our inference, not a vendor statement
v < 3.20
Affected range stops below 3.20, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp341000 (same device)
v < 3.20
Affected range stops below 3.20, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp342000 (same device)
v < 3.20
Affected range stops below 3.20, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp3420102 (same device)
v < 3.20
Affected range stops below 3.20, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp342020 (same device)
v < 3.20
Affected range stops below 3.20, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp3420302 (same device)
v < 3.10
Affected range stops below 3.10, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m580-bmeh582040 (same device)
v < 3.10
Affected range stops below 3.10, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m580-bmeh584040 (same device)
v < 3.10
Affected range stops below 3.10, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m580-bmeh584040s (same device)
v < 3.10
Affected range stops below 3.10, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m580-bmeh586040 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-863

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