Skip to content
Fencer Intel
critical 9.8

CVE-2019-6808 json

A CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Pre…

published 7y ago modified 4mo ago also EUVD-2019-16362

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.2%
EPSS 8.2% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

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.

Patch / fix

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

Is CVE-2019-6808 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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 10.0

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 all versions
    affected: mitigation, no fix planned se.com
  • Schneider Electric Modicon Quantum Controller Modicon Quantum Firmware all versions Schneider Electric Modicon Quantum Safety Controller Modicon Quantum Safety Firmware all versions
    affected: mitigation, no fix planned se.com
  • Schneider Electric Modicon M340 Controller Modicon M340 Firmware 3.60 Schneider Electric Modicon M580 Controller Modicon M580 Firmware 4.20
    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

8.16% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • talosintelligence.com https://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0771 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • n/a Modicon M580 Modicon M340 Modicon Quantum Modicon Premium

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Intel 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.