MM
Product
Modicon M251 Firmware
by Schneider-electric · last CVE Mar 10, 2026
10
CVEs
0
On KEV
9.8
Max CVSS
0
New 30D
Severity mix
Critical 3High 3Medium 4Low 0
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Add Modicon M251 Firmware to your stack to get only the CVEs that touch what you run.

CVECVSSEPSSPublishedSummary · affected versions
CVE-2019-6820
8.2
1%
May 22
A CWE-306: Missing Authentication for Critical Function vulnerability exists which could cause a modification of device IP configuration (IP address, network mask and gateway IP…
Affected: All versions, or not specified
CVE-2021-22699
7.5
1%
May 26
Improper Input Validation vulnerability exists in Modicon M241/M251 logic controllers firmware prior to V5.1.9.1 that could cause denial of service when specific crafted requests…
Affected: before 5.1.9.1
CVE-2020-7488
7.5
1%
Apr 22
A CWE-319: Cleartext Transmission of Sensitive Information vulnerability exists which could leak sensitive information transmitted between the software and the Modicon M218, M241,…
Affected: All versions, or not specified
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