{"id":"CVE-2026-67873","details":"A heap-based buffer overflow exists in lib60870-C 2.4.0 in the server-side FileSegment ASDU encoding path. The issue occurs because FileSegment_encode() validates only the standalone segment length via FileSegment_GetMaxDataSize() and does not verify the residual capacity of the current ASDU frame before encoding object fields and segment data","modified":"2026-08-12T04:18:45.195768482Z","published":"2026-08-05T00:00:00Z","database_specific":{"cna_assigner":"mitre","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67873.json"},"references":[{"type":"WEB","url":"https://github.com/mz-automation/lib60870/blob/master/user_guide.adoc"},{"type":"WEB","url":"https://github.com/mz-automation/lib60870/releases/tag/v2.4.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67873.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67873"},{"type":"REPORT","url":"https://github.com/mz-automation/lib60870/issues/201"},{"type":"PACKAGE","url":"https://github.com/mz-automation/lib60870"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mz-automation/lib60870","events":[{"introduced":"0"},{"fixed":"083dc8ecc222b0e07a04721075134ee7836ca6af"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v2.3.6","v2.3.5","v2.3.4","v2.3.3","v2.3.2","v2.3.1","v2.3.0","v2.2.1","v2.2.0","v2.1.1","v2.1.0","v2.0.1","v2.0.0","v0.9.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67873.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}