Public proof of conceptFix available

CVE-2019-6829

Q: Is CVE-2019-6829 actively exploited?

A proof-of-concept exploit exists for CVE-2019-6829, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2019-6829?

CVE-2019-6829 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

A public proof of concept exists; no exploitation attested.

Published2019-09-17
Fixed in3.10
WeaknessCWE-248 · CWE-755

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2019-09-1720:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-6829?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-6829?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Schneider-electric modicon m340 firmwareversion to verify

Branch	Affected	Fixed in	Source
3.10	< 3.10	3.10	NVD

Schneider-electric modicon m580 firmwareversion to verify

Branch	Affected	Fixed in	Source
2.90	< 2.90	2.90	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Schneider-electric modicon m340 firmware to 3.10

Advisories and patches

www.schneider-electric.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionpoc2026-05-29
OpenCVESSVC decisionpoc—
CISA-ADPCVSS 3.17.52026-05-29
NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.07.8read 2026-10-23
CNAweakness (CWE)CWE-248read 2026-10-23
NVDweakness (CWE)CWE-755read 2026-10-23
FIRST EPSSEPSS score1.6 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2019-09-17
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-6829?

Is CVE-2019-6829 actively exploited?

A proof-of-concept exploit exists for CVE-2019-6829, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2019-6829?

CVE-2019-6829 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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