CVE-2026-111280
snap7 through 1.4.3 contains an out-of-bounds write vulnerability in TSnap7MicroClient::opReadArea() that allows malicious S7 peers to overf
CVSS
7.4
Alto
EPSS
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KEV
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Exploit Today
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0-100
Publicado: 15 oct 2026 · Última mod.: 15 oct 2026 · CWE-787
Sin historial EPSS suficiente todavía.
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.
- github.comhttps://github.com/davenardella/snap7
- github.comhttps://github.com/davenardella/snap7/blob/30f37da3114024a71ba93f7fd855c680b97a406f/src/core/s7_micro_client.cpp#L136-L150
- github.comhttps://github.com/davenardella/snap7/issues/31
- www.vulncheck.comhttps://www.vulncheck.com/advisories/snap7-through-1.4.3-out-of-bounds-write-via-tsnap7microclient-opreadarea
CVECVSSEPSSKEVRExplotTítuloVis.
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