rootpwn

high · CVSS v3 7.4 · CVSS v4 8.3

CVE-2026-111280

snap7 through 1.4.3 contains an out-of-bounds write vulnerability in TSnap7MicroClient::opReadArea() that allows malicio…

Description

snap7 through 1.4.3 contains an out-of-bounds write vulnerability in TSnap7MicroClient::opReadArea() that allows malicious S7 peers to overflow client buffers via an unchecked DataLength field. Rogue or impersonated PLCs can return crafted ReadVar responses causing memcpy of up to 65535 bytes into caller buffers, crashing SCADA, HMI, or gateway processes and corrupting memory.

Scores

Severity
high
CVSS v2
7.1
CVSS v3
7.4
CVSS v4
8.3
EPSS
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