CVE-2018-7830

mediumpriority · track · 31EPSS 0.024 · 84 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.42% (84th) EPSS

CVSS 5 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.06.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.15.3mediumAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · FSTEC (BDU) RU

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-113USprimaryCWE-113US

affected products (9)

Products and version ranges known to be affected.

Schneider Electric SE Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200≤ Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200enisa_euvdEU
Schneider Electric Modicon BMXNOR0200all versionsfstec_bduRU
Schneider Electric Modicon M340all versionsfstec_bduRU
Schneider Electric Modicon Premiumall versionsfstec_bduRU
Schneider Electric Modicon Quantumall versionsfstec_bduRU
schneider-electric modicom bmxnor0200h firmwareall versionsnvdUScpe:2.3:o:schneider-electric:modicom_bmxnor0200h_firmware:*:*:*:*:*:*:*:*
schneider-electric modicom m340 firmwareall versionsnvdUScpe:2.3:o:schneider-electric:modicom_m340_firmware:*:*:*:*:*:*:*:*
schneider-electric modicom premium firmwareall versionsnvdUScpe:2.3:o:schneider-electric:modicom_premium_firmware:*:*:*:*:*:*:*:*
schneider-electric modicom quantum firmwareall versionsnvdUScpe:2.3:o:schneider-electric:modicom_quantum_firmware:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2018-11-30modified 2026-06-17

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+213 more

references (7)

External citations — patches, advisories, analysis.

scry

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