Is CVE-2019-6821 in the CISA KEV catalog?

No. CVE-2019-6821 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-6821?

CVE-2019-6821 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2019-6821?

CVE-2019-6821 has an EPSS score of 1.93% (77th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-6821?

Upgrade modicon m580 firmware to 2.30 or later.

CVE & CISA-KEV Catalog

CVE-2019-6821

MEDIUMEPSS 77th pctl

6.5

CVSS v3

NVD

Description

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.

CWE-330

How to fix

Remediation Available

modicon m580 firmwareNVD

Affected:< 2.30Fixed in:2.30CVE-2019-6821derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploit Intelligence

1.93%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

References

Patch1

schneider-electric.com

Third-Party Advisory2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.