CVE-2026-67873

CRITICAL

lib60870-C < 2.4.0 - Heap-Based Buffer Overflow in FileSegment ASDU Encoding

Title source: llm
STIX 2.1

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

References (4)

Core 4

Scores

CVSS v3 9.8
EPSS 0.0040
EPSS Percentile 32.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-122
Status published
Published Aug 06, 2026
Tracked Since Aug 06, 2026