CVE-2026-67873

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-67873
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-06 00:16:54 UTC
Updated2026-08-06 13:18:23 UTC
DescriptionA 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

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from ADP

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

EPSS: 0.004010000 probability, percentile 0.329600000 (date 2026-08-07)

Problem Types: CWE-122 | n/a | CWE-122 CWE-122 Heap-based Buffer Overflow

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
github.com/mz-automation/lib60870 [email protected] github.com
github.com/mz-automation/lib60870/releases/tag/v2.4.0 [email protected] github.com
github.com/mz-automation/lib60870/issues/201 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/mz-automation/lib60870/blob/master/user_guide.adoc [email protected] github.com
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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