{"id":"CVE-2026-115723","revision":null,"records":[{"revision":"d1e6b676c2664e829964c588f5fe83d3","observedAt":"2026-10-23T16:48:20.594+00:00","statement":{"source":"cve-program","id":"CVE-2026-115723","aliases":[],"title":"Snap7 through 1.4.3 Out-of-Bounds Write via BRecv and CheckAsBRecvCompletion","description":"Snap7 through 1.4.3 contains an out-of-bounds write vulnerability in the passive partner that allows a malicious active partner to overflow application buffers by declaring an unvalidated BSend total length. Attackers connecting from the configured peer address can declare up to 65535 bytes and send a short fragment, causing BRecv to memcpy past the buffer and crash or corrupt SCADA, HMI or gateway processes.","state":0,"publishedAt":"2026-10-23T11:36:47.011+00:00","modifiedAt":"2026-10-23T14:59:52.69+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                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\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/pull/41","https://github.com/davenardella/snap7/blob/30f37da3114024a71ba93f7fd855c680b97a406f/src/core/s7_partner.cpp#L1126-L1166","https://github.com/davenardella/snap7/blob/30f37da3114024a71ba93f7fd855c680b97a406f/src/core/s7_partner.cpp#L850-L867","https://www.vulncheck.com/advisories/snap7-through-1.4.3-out-of-bounds-write-via-brecv-and-checkasbrecvcompletion"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115723","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-115723","identifiers":["CVE-2026-115723"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-27T22:48:27.8735791+00:00","complete":true,"records":1760,"lastAttemptAt":"2026-10-27T22:48:27.8735791+00:00","lastSuccessAt":"2026-10-27T22:48:28.062428+00:00","error":null,"lastVerifiedAt":"2026-10-27T22:48:28.0624333+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-187d2b72c94ceb8c4417f1032ec3109a3a3a7b730abadb561d8cdd2a96e04d27-b862afe5de83e90dc08716e86d08f4414ecf7d212ea995783c8d7f219f2f158d","complete":true,"records":415399,"lastAttemptAt":"2026-10-27T22:46:18.0168854+00:00","lastSuccessAt":"2026-10-27T22:46:17.3031818+00:00","error":null,"lastVerifiedAt":"2026-10-27T22:46:18.0168854+00:00","snapshotPublishedAt":"2026-10-27T22:18:50+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-cddf3b25f65843e7af577dc4490a616f","complete":false,"records":7229,"lastAttemptAt":"2026-10-27T23:00:33.9514204+00:00","lastSuccessAt":"2026-10-27T23:00:33.941+00:00","error":null,"lastVerifiedAt":"2026-10-27T23:00:33.941+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":2500,"expectedIdentifiers":13514,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-27T22:48:27.8735791+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-27T22:48:27.8735791+00:00","lastSuccessAt":"2026-10-27T22:48:28.0635411+00:00","error":null,"lastVerifiedAt":"2026-10-27T22:48:28.0635415+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-8d16a738328646698f9217d8ea11893c","complete":true,"records":13449,"lastAttemptAt":"2026-10-27T22:48:29.5002286+00:00","lastSuccessAt":"2026-10-27T22:48:29.491+00:00","error":null,"lastVerifiedAt":"2026-10-27T22:48:29.491+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13514,"expectedIdentifiers":13514,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-f7cb12508d9e6a348c8a60f772ed85529cc80cd2ff853da1099b57754b20e943","complete":true,"records":9790,"lastAttemptAt":"2026-10-27T22:48:27.45111+00:00","lastSuccessAt":"2026-10-27T21:49:03.9756799+00:00","error":null,"lastVerifiedAt":"2026-10-27T22:48:27.45111+00:00","snapshotPublishedAt":"2026-10-27T21:48:11+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-72e5e79de0026dd0562d40734074a2236a06886643d67182b8381eaee757dbf7","complete":true,"records":1966,"lastAttemptAt":"2026-10-27T22:46:18.1663373+00:00","lastSuccessAt":"2026-10-27T21:46:38.0277323+00:00","error":null,"lastVerifiedAt":"2026-10-27T22:46:18.1663373+00:00","snapshotPublishedAt":"2026-10-27T21:18:15+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-3a5b306d60fc44677a03a8afc99d87e6c5402770ef68d560f94a8c3ad3802b75","complete":true,"records":3001,"lastAttemptAt":"2026-10-27T22:48:27.8350787+00:00","lastSuccessAt":"2026-10-27T16:45:49.0050993+00:00","error":null,"lastVerifiedAt":"2026-10-27T22:48:27.8350787+00:00","snapshotPublishedAt":"2026-10-27T16:33:43+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-47974f108965af24b5d9587fcaeea141fcdec43aef7cf0be9bc964d19fb249c4","complete":true,"records":230846,"lastAttemptAt":"2026-10-27T22:48:27.3197562+00:00","lastSuccessAt":"2026-10-27T22:48:25.924242+00:00","error":null,"lastVerifiedAt":"2026-10-27T22:48:27.3197562+00:00","snapshotPublishedAt":"2026-10-27T22:33:19+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}