CVE-2026-67873

critical · 9.8

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

9.8

CVSS

0.4%

EPSS (exploit prob.)

34th

EPSS percentile

2026-08-06

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-122

References

https://github.com/mz-automation/lib60870
https://github.com/mz-automation/lib60870/blob/master/user_guide.adoc
https://github.com/mz-automation/lib60870/issues/201
https://github.com/mz-automation/lib60870/releases/tag/v2.4.0
https://github.com/mz-automation/lib60870/issues/201

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-67873