CVE-2020-7540
A CWE-306: Missing Authentication for Critical Function vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions),…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A CWE-306: Missing Authentication for Critical Function vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause unauthenticated command execution in the controller when sending special HTTP requests.
- 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
- 2.32% probability · 83th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-306
- Affected
- schneider-electric/modicon m340 bmxp341000 firmware · schneider-electric/modicon m340 bmxp342000 firmware · schneider-electric/modicon m340 bmxp3420102 firmware · schneider-electric/modicon m340 bmxp3420102cl firmware · schneider-electric/modicon m340 bmxp342020 firmware · schneider-electric/modicon m340 bmxp3420302 firmware · schneider-electric/modicon m340 bmxp3420302cl firmware · schneider-electric/bmxnoe0100 firmware · schneider-electric/bmxnoe0110 firmware · schneider-electric/140noe77101 firmware · schneider-electric/140noe77111 firmware · schneider-electric/140cpu65150 firmware · schneider-electric/140cpu65160 firmware · schneider-electric/140noc78000 firmware · schneider-electric/140noc78100 firmware · schneider-electric/140noc77101 firmware · schneider-electric/tsxp574634 firmware · schneider-electric/tsxp575634 firmware · schneider-electric/tsxp576634 firmware · schneider-electric/tsxety4103 firmware · +3 more
- Source
- cybersecurity@se.com
EPSS 2.3% since 26 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.se.com/ww/en/download/document/SEVD-2020-343-04/Vendor Advisory
- https://www.se.com/ww/en/download/document/SEVD-2020-343-04/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.