CVE-2018-7809
An Unverified Password Change vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 which could allow an unauthenticated remote user to access the password delete function of the web server.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An Unverified Password Change vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 which could allow an unauthenticated remote user to access the password delete function of the web server.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.47% probability · 84th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-640
- Affected
- schneider-electric/modicom m340 firmware · schneider-electric/modicom premium firmware · schneider-electric/modicom quantum firmware · schneider-electric/modicom bmxnor0200h firmware
- Source
- cybersecurity@se.com
EPSS 2.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/Vendor Advisory
- https://www.tenable.com/security/research/tra-2018-38Exploit, Third Party Advisory
- https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/Vendor Advisory
- https://www.tenable.com/security/research/tra-2018-38Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.