CVE-2018-7791
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).
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.90%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.90% probability · 78th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-287, CWE-284
- Affected
- schneider-electric/modicon m221 firmware
- Source
- cybersecurity@se.com
References
- http://www.securityfocus.com/bid/105182Third Party Advisory, VDB Entry
- https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01/Mitigation, Vendor Advisory
- http://www.securityfocus.com/bid/105182Third Party Advisory, VDB Entry
- https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01/Mitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.