CVE-2019-6829

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-09-17 · updated 2026-06-17
Weakness: CWE-248

Description

A CWE-248: Uncaught Exception vulnerability exists in Modicon M580 (firmware version prior to V2.90) and Modicon M340 (firmware version prior to V3.10), which could cause a possible denial of service when writing to specific memory addresses in 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

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

https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/

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