CVE-2017-6034

Name: CVE-2017-6034
Creator: NVD / NIST
Published: 2017-06-30T03:29:00.453+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 5.14%

Last modified Jun 17, 2026

CVE-2017-6034 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An authentication bypass by capture-replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download.. EPSS estimates a 5.14% chance of exploitation in the next 30 days.

Description

An authentication bypass by capture-replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

5.14%

91.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Schneider-Electric	Modbus Firmware	All versions

References

http://www.securityfocus.com/bid/97562Third Party Advisory, VDB Entry
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2017/icsa-17-101-01.json
https://ics-cert.us-cert.gov/advisories/ICSA-17-101-01Third Party Advisory, US Government Resource
https://www.se.com/us/en/download/document/SEVD-2017-065-01/
http://www.securityfocus.com/bid/97562Third Party Advisory, VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-17-101-01Third Party Advisory, US Government Resource

Timeline

Published: Jun 30, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-6034?

How severe is CVE-2017-6034?

CVE-2017-6034 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 5.14% probability of exploitation in the next 30 days.

How do I fix CVE-2017-6034?

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-2017-6034?

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

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Source: NVD / NIST