CVE-2017-1000230

7.5 highEPSS 1.0%

High (7.5) in snap7 project snap7 server. EPSS 1.0% chance of exploitation in the next 30 days.

The Snap7 Server version 1.4.1 can be crashed when the ItemCount field of the ReadVar or WriteVar functions of the S7 protocol implementation in Snap7 are provided with unexpected input, thus resulting in denial of service attack.

Severity

CVSS 3.0

7.5 high

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 1.0% chance of exploitation in the next 30 days; higher than 63% of CVEs (scores of 2026-10-31)
CWE: CWE-20
Published: 2017-11-17
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

snap7_project:snap7_server

References

https://sourceforge.net/p/snap7/discussion/bugfix/thread/2d2d085c/
https://sourceforge.net/p/snap7/discussion/bugfix/thread/2d2d085c/

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