Home/CVE/CWE-330: Use of Insufficiently Random Values vulnerability, which could cause the hijacking of the TCP connection when u
CVE

CVE-2019-6821

CWE-330: Use of Insufficiently Random Values vulnerability, which could cause the hijacking of the TCP connection when u

CWE-330: Use of Insufficiently Random Values vulnerability, which could cause the hijacking of the TCP connection when using Ethernet communication in Modicon M580 firmware versions prior to V2.30, and all firmware versions of Modicon M340, Modicon Premium, Modicon Quantum.

MEDIUM · CVSS 6.5 EPSS 0.00225
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-330Use of Insufficiently Random Values
CWE-330Use of Insufficiently Random Values
▤

Affected Products & Versions

4
schneider-electric modicon m580 firmware< 2.30
schneider-electric modicon m340 firmwareall versions
schneider-electric modicon quantum firmwareall versions
schneider-electric modicon premium firmwareall versions
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · cybersecurity@se.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 May 2019 · 08:29 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
⚑

Vendor Advisories

1
cisa-csafcisa-csaf-csaf_files-OT-white-2019-icsa-19-136-01
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/108366Third Party AdvisoryVDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-19-136-01Third Party AdvisoryUS Government Resource
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-03/PatchVendor Advisory
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