Is CVE-2018-7855 in the CISA KEV catalog?

No. CVE-2018-7855 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-7855?

CVE-2018-7855 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2018-7855?

CVE-2018-7855 has an EPSS score of 2.63% (84th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-7855?

Upgrade modicon m340 firmware to 3.10 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-7855

HIGHEPSS 84th pctl

7.5

CVSS v3

NVD

Description

A CWE-248 Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause a Denial of Service when sending invalid breakpoint parameters to the controller over Modbus

CWE-754

How to fix

Remediation Available

modicon m340 firmwareNVD

Affected:< 3.10Fixed in:3.10CVE-2018-7855derived from NVD

modicon m580 firmwareNVD

Affected:< 2.90Fixed in:2.90CVE-2018-7855derived 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

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.63%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Exploit2

Vendor Advisory1

schneider-electric.com

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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.