What’s Vulnerable › Vulnerabilities

CVE-2017-6028

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-06-30 · updated 2026-06-17
• Weakness: CWE-522

Description

An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs Modicon M241, all firmware versions, and Modicon M251, all firmware versions. Log-in credentials are sent over the network with Base64 encoding leaving them susceptible to sniffing. Sniffed credentials could then be used to log into the web application.

Affected products

• Schneider-Electric Modicon M241 Firmware: through 4.0.3.20
• Schneider-Electric Modicon M251 Firmware: through 4.0.3.20

References

• http://www.securityfocus.com/bid/97254
• https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02
• http://www.securityfocus.com/bid/97254
• https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02

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