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Critical severity · published Aug 29, 2018
CVE-2018-7790
An Information Management Error vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0)
9.8
CVSS
2.5%
EPSS
No
On KEV
Description
An Information Management Error vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to replay authentication sequences. If an attacker exploits this vulnerability and connects to a Modicon M221, the attacker can upload the original program from the PLC.
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)2.5% · higher than 84% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MM
Modicon M221 Firmware · Schneider-electric
before 1.6.2.0 · source: NVD
Affected product
MM
Modicon M221 Firmware
Schneider-electric
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-7790
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-7790
Third Party Advisory
http://www.securityfocus.com/bid/105182
Mitigation
https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01/
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