CVE WatchAug 31, 2026

CVE-2026-67873

A heap-based buffer overflow exists in lib60870-C 2.4.0 in the server-side FileSegment ASDU encoding path. The issue occurs because FileSegm

CVSS

9.8

Critical

EPSS

0.4%

p34

KEV

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Exploit Today

0-100

Published: Aug 6, 2026 · Last modified: Aug 31, 2026 · CWE-122

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-08-252026-09-22

Technical 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

Official references

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