CVE-2021-22791: Medium severity Schneider-electric Modicon M340 Bmxp341000 vulnerability
A CWE-787: Out-of-bounds Write vulnerability that could cause a Denial of Service on the Modicon PLC controller / simulator when updating the controller application with a specially crafted project file exists in Modicon M580 CPU (part numbers BMEP and BMEH, all versions), Modicon M340 CPU (part numbers BMXP34, all versions), Modicon MC80 (part numbers BMKC80, all versions), Modicon Momentum Ethernet CPU (part numbers 171CBU, all versions), PLC Simulator for EcoStruxureª Control Expert, including all Unity Pro versions (former name of EcoStruxureª Control Expert, all versions), PLC Simulator for EcoStruxureª Process Expert including all HDCS versions (former name of EcoStruxureª Process Expert, all versions), Modicon Quantum CPU (part numbers 140CPU, all versions), Modicon Premium CPU (part numbers TSXP5, all versions).
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the vulnerability ID of this security issue?
The vulnerability ID is CVE-2021-22791.
What is the severity level of CVE-2021-22791?
The severity level of CVE-2021-22791 is medium with a CVSS score of 6.5.
Which software or devices are affected by CVE-2021-22791?
The Modicon M340 CPU (part numbers BMEP*) and Modicon M580 CPU (part numbers BMEP* and BMEH*) are affected by CVE-2021-22791.
How does CVE-2021-22791 impact the affected software or devices?
CVE-2021-22791 is an out-of-bounds write vulnerability that could cause a Denial of Service on the Modicon PLC controller / simulator when updating the controller application with a specially crafted project file.
How can I find more information about CVE-2021-22791?
You can find more information about CVE-2021-22791 at the following references: [SEVD-2021-222-04](https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-04) and [SEVD-2021-222-06](https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-06).