VULNERABILITY INTELLIGENCE

CVE-2026-67873

CVSS score9.8 CRITICAL
EPSS probability0.73%
CISA KEVNot currently listed
Published2026-08-06
Last modified2026-08-31
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

Weakness classification

  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-122

Primary references