CVE-2018-7790

An Information Management Error 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 replay authentication sequences. If an attacker exploits this vulnerability and connects to a Mo...

critical 9.8 CVSS 3.1
Published: Aug 29, 2018
Modified: May 29, 2026
Vendor: Schneider-Electric
Product: Modicon M221 Firmware

Description

An Information Management Error 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 replay authentication sequences. If an attacker exploits this vulnerability and connects to a Modicon M221, the attacker can upload the original program from the PLC.

References

Related CVEs

CVE-2022-0715 critical · 9.1
A CWE-287: Improper Authentication vulnerability exists that could cause an attacker to arbitrarily change the behavior of the UPS when a key is leaked and used to upload malicious
CVE-2021-22787 high · 7.5
A CWE-20: Improper Input Validation vulnerability exists that could cause denial of service of the device when an attacker sends a specially crafted HTTP request to the web server
CVE-2021-22788 high · 7.5
A CWE-787: Out-of-bounds Write vulnerability exists that could cause denial of service when an attacker sends a specially crafted HTTP request to the web server of the device. Affe
CVE-2021-22785 high · 7.5
A CWE-200: Information Exposure vulnerability exists that could cause sensitive information of files located in the web root directory to leak when an attacker sends a HTTP request
CVE-2020-7534 high · 8.8
A CWE-352: Cross-Site Request Forgery (CSRF) vulnerability exists on the web server used, that could cause a leak of sensitive data or unauthorized actions on the web server during
CVE-2021-22789 medium · 6.5
A CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability that could cause a Denial of Service on the Modicon PLC controller / simulator when