CVE-2018-7833

Name: CVE-2018-7833
Creator: NVD / NIST
Published: 2018-12-17T22:29:00.347+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.38%

Last modified Jun 17, 2026

CVE-2018-7833 is a vulnerability of currently unknown severity. An Improper Check for Unusual or Exceptional Conditions vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where an unauthenticated user can send a specially crafted XML data via a POST request to cause the web server to become unavailable. EPSS estimates a 1.38% chance of exploitation in the next 30 days.

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where an unauthenticated user can send a specially crafted XML data via a POST request to cause the web server to become unavailable

Metrics

EPSS Probability

1.38%

68.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-754

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.schneider-electric.com/en/download/document/SEVD-2018-327-01/Vendor Advisory

Timeline

Published: Dec 17, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-7833?

How severe is CVE-2018-7833?

Severity scoring for CVE-2018-7833 is pending analysis. The EPSS model estimates a 1.38% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7833?

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-2018-7833?

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

Scan your code now

Source: NVD / NIST