Critical severity · published Dec 11, 2020
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…
9.8
CVSS
2.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.3% · higher than 83% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
1F
140cpu65150 Firmware · Schneider-electric
before 6.1 · source: NVD
1F
140cpu65160 Firmware · Schneider-electric
before 6.1 · source: NVD
1F
140noc77101 Firmware · Schneider-electric
before 1.08 · source: NVD
1F
140noc78000 Firmware · Schneider-electric
before 1.74 · source: NVD
1F
140noc78100 Firmware · Schneider-electric
before 1.74 · source: NVD
1F
140noe77101 Firmware · Schneider-electric
before 7.1 · source: NVD
1F
140noe77111 Firmware · Schneider-electric
before 7.1 · source: NVD
BF
Bmxnoc0401 Firmware · Schneider-electric
before 2.10 · source: NVD
BF
Bmxnoe0100 Firmware · Schneider-electric
before 3.3 · source: NVD
BF
Bmxnoe0110 Firmware · Schneider-electric
before 6.5 · source: NVD
BF
Bmxnor200h Firmware · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M340 Bmxp341000 Firmware · Schneider-electric
before 3.30 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7540
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-7540
Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2020-343-04/
More from 140cpu65150 Firmware
9.8
CVE-2018-7761
A vulnerability exists in the HTTP request parser in Schneider Electric's Modicon M340, Modicon Premium, Modicon Quantum PLC, BMXNOR0200 which could allow arbitrary code execution
9.8
CVE-2018-7760
An authorization bypass vulnerability exists in Schneider Electric's Modicon M340, Modicon Premium, Modicon Quantum PLC, BMXNOR0200
9.8
CVE-2018-7242
Vulnerable hash algorithms exists in Schneider Electric's Modicon Premium, Modicon Quantum, Modicon M340, and BMXNOR0200 controllers in all versions of the communication modules
9.8
CVE-2018-7241
Hard coded accounts exist in Schneider Electric's Modicon Premium, Modicon Quantum, Modicon M340, and BMXNOR0200 controllers in all versions of the communication modules
8.8
CVE-2018-7240
A vulnerability exists in Schneider Electric's Modicon Quantum in all versions of the communication modules which could allow arbitrary code execution