CVE-2018-7791 Details
Description
A Permissions, Privileges, and Access Control 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 overwrite the original password with their password. If an attacker exploits this vulnerability and overwrite the password, the attacker can upload the original program from the PLC.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 29, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01/ | CVE | MitigationVendor Advisory |
| http://www.securityfocus.com/bid/105182 | CVE | Third Party AdvisoryVDB Entry |
| https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01/ | [email protected] | MitigationVendor Advisory |
| http://www.securityfocus.com/bid/105182 | [email protected] | Third Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
| CWE-284 | Improper Access Control | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| schneider-electric modicon m221 firmware | < 1.6.2.0 |
CPE
Remediation
| |
| schneider-electric modicon m221 | All versions |
CPE
Remediation
| |
Change History
16 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 29, 2026 | CVE Modified | CISA-ADP |
| Nov 21, 2024 | CVE Modified | CVE |
| May 14, 2024 | CVE Modified | [email protected] |
| Feb 3, 2022 | Reanalysis | [email protected] |
| Jan 31, 2022 | CPE Deprecation Remap | [email protected] |
| Jan 31, 2022 | CPE Deprecation Remap | [email protected] |
| Jan 31, 2022 | CPE Deprecation Remap | [email protected] |
| Jan 31, 2022 | CPE Deprecation Remap | [email protected] |
| Jan 31, 2022 | CPE Deprecation Remap | [email protected] |
| Aug 19, 2021 | CPE Deprecation Remap | [email protected] |
| Aug 19, 2021 | CPE Deprecation Remap | [email protected] |
| Oct 3, 2019 | CWE Remap | [email protected] |
| Nov 7, 2018 | Initial Analysis | [email protected] |
| Aug 31, 2018 | CVE Modified | [email protected] |