High severity · published Feb 1, 2023
CVE-2021-22786
A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive information stored on the memory of the controller when communicating over the…
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive information stored on the memory of the controller when communicating over the Modbus TCP protocol. Affected Products: Modicon M340 CPU (part numbers BMXP34*) (Versions prior to V3.30), Modicon M580 CPU (part numbers BMEP* and BMEH*) (Versions prior to SV3.20), Modicon MC80 (BMKC80) (Versions prior to V1.6), Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S) (All Versions), Modicon Momentum MDI (171CBU*) (Versions prior to V2.3), Legacy Modicon Quantum (All Versions)
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MM
Modicon M340 Bmxp341000 Firmware · Schneider-electric
before 3.40 · source: NVD
MM
Modicon M340 Bmxp342000 Firmware · Schneider-electric
before 3.40 · source: NVD
MM
Modicon M340 Bmxp342010 Firmware · Schneider-electric
before 3.40 · source: NVD
MM
Modicon M340 Bmxp3420102 Firmware · Schneider-electric
before 3.40 · source: NVD
MM
Modicon M340 Bmxp342020 Firmware · Schneider-electric
before 3.40 · source: NVD
MM
Modicon M340 Bmxp342020h Firmware · Schneider-electric
before 3.40 · source: NVD
MM
Modicon M340 Bmxp342030 Firmware · Schneider-electric
before 3.40 · source: NVD
MM
Modicon M340 Bmxp3420302 Firmware · Schneider-electric
before 3.40 · source: NVD
MM
Modicon M340 Bmxp3420302h Firmware · Schneider-electric
before 3.40 · source: NVD
MM
Modicon M340 Bmxp342030h Firmware · Schneider-electric
before 3.40 · source: NVD
MM
Modicon M580 Bmeh582040 Firmware · Schneider-electric
through 3.20 · source: NVD
MM
Modicon M580 Bmeh582040c Firmware · Schneider-electric
through 3.20 · source: NVD
Affected product
MM
Modicon M340 Bmxp341000 Firmware
Schneider-electric
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22786
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-22786
Patch
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-221-04&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2022-221-04-Modicon_Controllers_Ethernet_Modules_Security_Notification.pdf
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