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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.","state":0,"publishedAt":"2026-10-15T21:43:24.65+00:00","modifiedAt":"2026-10-29T16:55:58.134+00:00","affected":[{"ecosystem":"Vendor product","name":"snap7","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"davenardella\",\n                    \"product\": \"snap7\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"1.4.3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:github/davenardella/snap7\",\n                    \"repo\": \"https://github.com/davenardella/snap7\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.3,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H","score":7.4,"severity":"HIGH"}],"references":["https://github.com/davenardella/snap7/issues/31","https://github.com/davenardella/snap7/blob/30f37da3114024a71ba93f7fd855c680b97a406f/src/core/s7_micro_client.cpp#L136-L150","https://github.com/davenardella/snap7","https://www.vulncheck.com/advisories/snap7-through-1.4.3-out-of-bounds-write-via-tsnap7microclient-opreadarea"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111280","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-111280","identifiers":["CVE-2026-111280"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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