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CVE-2019-6829

HIGH
7.5
CVSS Score
Published: September 17, 2019 at 07:44 PM UTC
Updated: June 17, 2026 at 02:39 AM UTC
4 products affected across 1 vendorModicon M580 FirmwareModicon M340 FirmwareModicon M340

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
PoC

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

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

Modicon M340 Firmware· Schneider Electric
95%
v < 3.10
Affected range stops below 3.10, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340 (same device)
Modicon M580 Firmware· Schneider Electric
95%
v < 2.90
Affected range stops below 2.90, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m580 (same device)
Modicon M340· Schneider Electric
60%
v < 3.10
Affected range stops below 3.10, so it looks safe — our inference, not a vendor statement
Modicon M580· Schneider Electric
60%
v < 2.90
Affected range stops below 2.90, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

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

Patch and advisory references

References (1)

x_refsource_MISCx_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-248CWE-755

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