Is CVE-2017-6026 in the CISA KEV catalog?

No. CVE-2017-6026 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-6026?

CVE-2017-6026 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2017-6026?

CVE-2017-6026 has an EPSS score of 31.82% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2017-6026

CRITICALEPSS 98th pctl

9.1

CVSS v3

NVD

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.

CWE-330

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploit Intelligence

31.82%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.