CVE-2018-7830

Name: CVE-2018-7830
Creator: NVD / NIST
Published: 2018-11-30T19:29:00.547+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.42%

Last modified Jun 17, 2026

CVE-2018-7830 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.42% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

2.42%

82.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-113

Affected Software

Vendor	Product	Versions
Schneider-Electric	Modicom M340 Firmware	All versions
Schneider-Electric	Modicom Premium Firmware	All versions
Schneider-Electric	Modicom Quantum Firmware	All versions
Schneider-Electric	Modicom Bmxnor0200h Firmware	All versions

References

https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/Vendor Advisory
https://www.tenable.com/security/research/tra-2018-38Exploit, Third Party Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/Vendor Advisory
https://www.tenable.com/security/research/tra-2018-38Exploit, Third Party Advisory

Timeline

Published: Nov 30, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-7830?

How severe is CVE-2018-7830?

Severity scoring for CVE-2018-7830 is pending analysis. The EPSS model estimates a 2.42% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7830?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-7830?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST