CVE-2018-7789

An Improper Check for Unusual or Exceptional Conditions 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 remotely reboot Modicon M221 using crafted programing protocol frames.

• CWE-754
• CWE-754

• http://www.securityfocus.com/bid/105171Third Party Advisory, VDB Entry
• https://ics-cert.us-cert.gov/advisories/ICSA-18-240-02Mitigation, Third Party Advisory, US Government Resource
• https://www.schneider-electric.com/en/download/document/SEVD-2018-233-01/Mitigation, Vendor Advisory
• http://www.securityfocus.com/bid/105171Third Party Advisory, VDB Entry
• https://ics-cert.us-cert.gov/advisories/ICSA-18-240-02Mitigation, Third Party Advisory, US Government Resource
• https://www.schneider-electric.com/en/download/document/SEVD-2018-233-01/Mitigation, Vendor Advisory

Published

Aug 29, 2018

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2018-7783Schneider Electric SoMachine Basic prior to v1.6 SP1 suffers…
• CVE-2018-7784In Schneider Electric U.motion Builder software versions pri…
• CVE-2018-7785In Schneider Electric U.motion Builder software versions pri…
• CVE-2018-7786In Schneider Electric U.motion Builder software versions pri…
• CVE-2018-7787In Schneider Electric U.motion Builder software versions pri…
• CVE-2018-7788A CWE-255 Credentials Management vulnerability exists in Mod…6.5
• CVE-2018-7790An Information Management Error vulnerability exists in Schn…9.8
• CVE-2018-7791A Permissions, Privileges, and Access Control vulnerability …9.8
• CVE-2018-7792A Permissions, Privileges, and Access Control vulnerability …7.5
• CVE-2018-7793A Credential Management vulnerability exists in FoxView HMI …
• CVE-2018-7794A CWE-754: Improper Check for Unusual or Exceptional Conditi…7.5
• CVE-2018-7795A Cross Protocol Injection vulnerability exists in Schneider…5.4