HIGH

CVE-2018-7830

CVSS v3

7.5

HIGH

EPSS Score

2.4 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2018-7830 yet.

Full record on NVD

Description

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where a denial of service can occur for ~1 minute by sending a specially crafted HTTP request.

Technical details

Published: 2018-11-30

Frequently asked questions

What is CVE-2018-7830?

Is CVE-2018-7830 actively exploited?

Active exploitation of CVE-2018-7830 has not been confirmed. Its EPSS score was 2.4% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-7830?

CVE-2018-7830 has a CVSS v3 base score of 7.5 (HIGH severity).

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