CVE-2020-22552

PoC —

CVSS 3.1

7.5 high

EPSS

1%p72

Published

Oct 28, 2020 (Oct 28, 2020)

Modified

Jul 9, 2026

Description

The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed.

Vendors: snap7 project
Products: snap7
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (1.5%)

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