CVE-2019-6845 — A CWE-319: Cleartext Transmission of Sensitive Information vulnerability exists

A CWE-319: Cleartext Transmission of Sensitive Information vulnerability exists in Modicon M580, Modicon M340, Modicon Premium , Modicon Quantum (all firmware versions), which could cause the disclosure of information when transferring applications to the controller using Modbus

01What is this vulnerability?

A CWE-319: Cleartext Transmission of Sensitive Information vulnerability exists in Modicon M580, Modicon M340, Modicon Premium , Modicon Quantum (all firmware versions), which could cause the disclosure of information when transferring applications to the controller using Modbus TCP protocol.

02Affected products

Vendor	Product	Versions
n	a / Modicon M580, Modicon M340, Modicon Premium , Modicon Quantum (all firmware versions)	Modicon M580, Modicon M340, Modicon Premium , Modicon Quantum (all firmware versions)

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-10-29T14:49:49.000Z
• Last modified: 2024-08-04T20:31:04.391Z

09References

• www.schneider-electric.com — https://www.schneider-electric.com/ww/en/download/document/SEVD-2019-281-03