{"id":"CVE-2026-67873","aliases":["EUVD-2026-53677","GHSA-vgf8-x653-r7r2"],"status":"published","title":"A heap-based buffer overflow exists in lib60870-C 2.4.0 in the server-side FileSegment ASDU...","description":"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","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00726,"percentile":0.5445,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-08-05T00:00:00Z","modified":"2026-10-28T11:17:15Z","references":[{"url":"https://github.com/mz-automation/lib60870","tags":["package"]},{"url":"https://github.com/mz-automation/lib60870/releases/tag/v2.4.0","tags":["web"]},{"url":"https://github.com/mz-automation/lib60870/blob/master/user_guide.adoc","tags":["web"]},{"url":"https://github.com/mz-automation/lib60870/issues/201","tags":["exploit","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67873","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vgf8-x653-r7r2"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67873.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-67873","description":"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","status":"published","published":"2026-08-05T00:00:00Z","modified":"2026-08-06T12:23:51.488Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:20:06.562031Z"}],"euvd":[{"id":"EUVD-2026-53677","description":"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","status":"published","published":"2026-08-05T00:00:00Z","modified":"2026-08-06T12:23:51Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:02:09.043832Z"}],"ghsa":[{"id":"GHSA-vgf8-x653-r7r2","title":"A heap-based buffer overflow exists in lib60870-C 2.4.0 in the server-side FileSegment ASDU...","description":"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","status":"published","published":"2026-08-06T00:31:32Z","modified":"2026-08-06T15:33:41Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:10:09.761462Z"}],"nvd":[{"id":"CVE-2026-67873","description":"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","status":"published","published":"2026-08-06T00:16:54.38Z","modified":"2026-08-31T19:33:11.197Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:35.031043Z"}],"osv":[{"id":"CVE-2026-67873","description":"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","status":"published","published":"2026-08-05T00:00:00Z","modified":"2026-10-28T11:17:15.668177574Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:14.46177Z"}]}}