CVE-2017-6034
An authentication bypass by capture-replay issue was discovered in Schneider Electric Modicon Modbus Protocol.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 5.49% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-294, CWE-287
- Affected
- schneider-electric/modbus firmware
- Source
- ics-cert@hq.dhs.gov
EPSS 5.5% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.