CVE-2018-7856
CVSS v3
7.5
HIGH
EPSS Score
1.6 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause a possible denial of Service when writing invalid memory blocks to the controller over Modbus.
Technical details
- Published
- 2019-05-22
Frequently asked questions
What is CVE-2018-7856?
A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause a possible denial of Service when writing invalid memory blocks to the controller over Modbus.
Is CVE-2018-7856 actively exploited?
Active exploitation of CVE-2018-7856 has not been confirmed. Its EPSS score was 1.6% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2018-7856?
CVE-2018-7856 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2018-7856 affecting your environment?
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