CVE-2017-6034

9.8 CRITICAL 6% exploit odds No fix listed Auth & access Device

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 5.6% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2017-02-16 00:00 UTC ReservedThe CVE id was reserved by its CNA
2017-06-30 03:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 01:21 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 5.6% in the next 30 days (EPSS).
Severity: 9.8 CRITICAL (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2017-06-30 03:29 UTC
Last modified: 2026-06-17 01:21 UTC
Exploit probability: 5.6% · EPSS, next 30 days
Weakness: CWE-294
Record status: Modified

Affected

schneider-electric Modbus Firmware

Attack profile CVSS 3.1 · 9.8

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

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

Is it in your code?

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References

NVD record · CVE.org record