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Fencer Vulns
high 7.5

CVE-2019-6809 json

A CWE-248: Uncaught Exception vulnerability exists in Modicon M580 (firmware versions prior to V2.90), Modicon M340 (firmware versions prio…

published 2019-09-17 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-16363

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

A CWE-248: Uncaught Exception vulnerability exists in Modicon M580 (firmware versions prior to V2.90), Modicon M340 (firmware versions prior to V3.10), Modicon Premium (all versions), Modicon Quantum (all versions), which could cause a possible denial of service when reading invalid data from the controller.

Patch / fix

  • schneider-electric modicon_m580_firmware 2.90
  • schneider-electric modicon_m340_firmware 3.10

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-114-01 updated cvss 7.5

Schneider Electric Modicon Controllers (Update A)

  • Schneider Electric Modicon M340 Controller Modicon M340 Firmware < 3.10
    affected: vendor fix, mitigation se.com
  • Schneider Electric Modicon M580 Controller Modicon M580 Firmware < 2.90
    affected: vendor fix, mitigation se.com
  • Schneider Electric Modicon Premium Controller Modicon Premium Firmware < 3.20
    affected: vendor fix, mitigation se.com
  • Schneider Electric Modicon Quantum Controller Modicon Quantum Firmware < 3.60
    affected: vendor fix, mitigation schneider-electric.com
  • Schneider Electric Modicon M340 Controller Modicon M340 Firmware 3.60 Schneider Electric Modicon M580 Controller Modicon M580 Firmware 4.20 Schneider Electric Modicon Premium Controller Modicon Premium Firmware 3.20 Schneider Electric Modicon Quantum Controller Modicon Quantum Firmware 3.60
    fixed

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

1.76% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

  • Schneider Electric SE Modicon M580
  • Schneider Electric SE Modicon M340
  • Schneider Electric SE Modicon Premium
  • Schneider Electric SE Modicon Quantum

Classification

Weakness
  • CWE-248 Uncaught Exception
  • CWE-755 Improper Handling of Exceptional Conditions

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.