EUVD-2026-102471

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...

CVE-2026-111280 snap7 through 1.4.3 Out-of-Bounds Write via TSnap7MicroClient::opReadArea

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...

CVE-2026-111280

The snap7 library, versions through 1.4.3 , is vulnerable to an out-of-bounds write in the TSnap7MicroClient::opReadArea() function. The root cause is an unchecked DataLength field , which allows malicious S7 peers to overflow client buffers. Specifically, rogue or impersonated PLCs can return cr...