Schneider-Electric: >> Modicon M251 Firmware >> 5.1.9.1 Security Vulnerabilities
CWE-404 Improper Resource Shutdown or Release vulnerability exists that could cause partial Denial of Service on Machine Expert protocol when an unauthenticated attacker sends malicious payload to occupy active communication channels.
CVSS Score
6.9
EPSS Score
0.005
Published
2026-03-10
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists that could cause condition where authenticated attackers can have a victim’s browser run arbitrary JavaScript when the victim hovers over a maliciously crafted element on a web server containing the injected payload.
CVSS Score
5.1
EPSS Score
0.004
Published
2026-03-10
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site
Scripting') vulnerability exists that could cause a vulnerability leading to a cross-site scripting
condition where attackers can have a victim’s browser run arbitrary JavaScript when they visit a
page containing the injected payload.
CVSS Score
5.4
EPSS Score
0.003
Published
2024-07-11
A CWE-345: Insufficient Verification of Data Authenticity vulnerability exists which could allow the attacker to execute malicious code on the Modicon M218, M241, M251, and M258 controllers.
CVSS Score
9.8
EPSS Score
0.007
Published
2020-04-22
A CWE-319: Cleartext Transmission of Sensitive Information vulnerability exists which could leak sensitive information transmitted between the software and the Modicon M218, M241, M251, and M258 controllers.
CVSS Score
7.5
EPSS Score
0.008
Published
2020-04-22
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 address) when a specific Ethernet frame is received in all versions of: Modicon M100, Modicon M200, Modicon M221, ATV IMC drive controller, Modicon M241, Modicon M251, Modicon M258, Modicon LMC058, Modicon LMC078, PacDrive Eco ,PacDrive Pro, PacDrive Pro2
CVSS Score
8.2
EPSS Score
0.012
Published
2019-05-22