CVE-2019-6816

CRITICALNVD 9.19.1—

9.1

In Modicon Quantum all firmware versions, a CWE-94: Code Injection vulnerability could cause an unauthorized firmware modification with possible Denial of Service when using Modbus protocol.

CVSS v3: 9.1
EG Score: 9.1(medium)
EPSS: 59.8%
KEV: Not listed

Published

May 22, 2019

Last Modified

November 21, 2024

References (2)

cybersecurity@sehttps://www.schneider-electric.com/en/download/document/SEVD-2019-134-09/
af854a3a-2127-422b-91ae-364da2661108https://www.schneider-electric.com/en/download/document/SEVD-2019-134-09/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-94Improper Control of Generation of Code (Code Injection)

Data Freshness Timeline

(refreshed 14× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-06 13:45 UTCepss_batch
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2026-05-26 13:42 UTCepss_batch

Frequently asked(5)

What is CVE-2019-6816?

CVE-2019-6816 is a critical vulnerability published on May 22, 2019. In Modicon Quantum all firmware versions, a CWE-94: Code Injection vulnerability could cause an unauthorized firmware modification with possible Denial of Service when using Modbus protocol.

When was CVE-2019-6816 disclosed?

CVE-2019-6816 was first published in the National Vulnerability Database on May 22, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-6816 actively exploited?

CVE-2019-6816 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 59.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-6816?

CVE-2019-6816 has a CVSS v3 base score of 9.1 (NVD).

How do I remediate CVE-2019-6816?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-6816, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2019-6816

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-6816?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)