What’s Vulnerable › Vulnerabilities

CVE-2017-6026

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 31.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-06-30 · updated 2026-06-17
• Weakness: CWE-330

Description

A Use of Insufficiently Random Values issue was discovered in Schneider Electric Modicon PLCs Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11. The session numbers generated by the web application are lacking randomization and are shared between several users. This may allow a current session to be compromised.

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
• https://www.exploit-db.com/exploits/45918/
• http://www.securityfocus.com/bid/97254
• https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02
• https://www.exploit-db.com/exploits/45918/

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