CVE-2020-5657
6.5 · MEDIUMOverview
CVE-2020-5657 is a medium-severity vulnerability affecting mitsubishielectric melsec_iq-rj71eip91_firmware. It was published on November 2, 2020 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
Improper neutralization of argument delimiters in a command ('Argument Injection') vulnerability in TCP/IP function included in the firmware of MELSEC iQ-R series (RJ71EIP91 EtherNet/IP Network Interface Module First 2 digits of serial number are '02' or before, RJ71PN92 PROFINET IO Controller Module First 2 digits of serial number are '01' or before, RD81DL96 High Speed Data Logger Module First 2 digits of serial number are '08' or before, RD81MES96N MES Interface Module First 2 digits of serial number are '04' or before, and RD81OPC96 OPC UA Server Module First 2 digits of serial number are '04' or before) allows unauthenticated attackers on adjacent network to stop the network functions of the products via a specially crafted packet.
Remediation
Check the references section for vendor advisories and patches from mitsubishielectric. Update melsec_iq-rj71eip91_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|
References
Frequently Asked Questions
What is CVE-2020-5657?
CVE-2020-5657 is a medium-severity vulnerability affecting mitsubishielectric melsec_iq-rj71eip91_firmware. It was published on November 2, 2020 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2020-5657?
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-5657?
Check the references section for vendor advisories and patches from mitsubishielectric. Update melsec_iq-rj71eip91_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-5657?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-5657 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
Related MEDIUM CVEs from 2020
View all →In postfix-mta-sts-resolver before 0.5.1, All users can receive incorrect response from daemon under
Potential security vulnerabilities have been identified in HPE OpenCall Media Platform (OCMP) result
In jQuery versions greater than or equal to 1.0.3 and before 3.5.0, passing HTML containing <option>
In jQuery starting with 1.12.0 and before 3.5.0, passing HTML from untrusted sources - even after sa
In Wiki.js before 2.3.81, there is a stored XSS in the Markdown editor. An editor with write access
The shell subsystem contains a buffer overflow, whereby an adversary with physical access to the dev
In FreeRDP less than or equal to 2.0.0, an Integer Overflow to Buffer Overflow exists. When using /v
In Saleor Storefront before version 2.10.3, request data used to authenticate customers was inadvert
Privilege Escalation vulnerability in the installer in McAfee McAfee Total Protection (MTP) trial pr
Authentication Protection Bypass vulnerability in McAfee Endpoint Security (ENS) for Windows prior t
Dell Inspiron 15 7579 2-in-1 BIOS versions prior to 1.31.0 contain an Improper SMM communication buf
Azure Sphere Elevation of Privilege Vulnerability