CVE-2019-6808

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-05-22 · updated 2026-06-17
Weakness: CWE-306

Description

A CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause a remote code execution by overwriting configuration settings of the controller over Modbus.

Affected products

Schneider-Electric Modicon M340 Firmware: before 3.10 — fixed in 3.10
Schneider Electric SE Modicon M580: before 2.90 — fixed in 2.90
Schneider-Electric Modicon Premium Firmware: through 3.20
Modicon Quantum - all firmware versions: through 3.60

How to fix

Upgrade to a fixed version: Schneider-Electric Modicon M340 Firmware 3.10; Schneider Electric SE Modicon M580 2.90. Check the vendor advisory for mitigations.

References

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