cve.bz

CVE-2020-7566

7.3 highEPSS 0.3%

High (7.3) in schneider-electric modicon m221 firmware. EPSS 0.3% chance of exploitation in the next 30 days.

A CWE-334: Small Space of Random Values vulnerability exists in Modicon M221 (all references, all versions) that could allow the attacker to break the encryption keys when the attacker has captured the traffic between EcoStruxure Machine - Basic software and Modicon M221 controller.

Severity

CVSS 3.1

7.3 high
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS
0.3% chance of exploitation in the next 30 days; higher than 21% of CVEs (scores of 2026-10-31)
CWE
CWE-334
Published
Modified
Record from
the NVD, synced

Affected

References

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