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Vulnerabilities CVE-2026-66360

CVE-2026-66360

High
Open
TLP:CLEAR

MZ Automation libiec61850 Out-of-bounds Read

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Description

The ISO Presentation layer contains a flaw in the handling of specific parameters during normal mode negotiation. A missing length check in the processing of the encoded presentation data allows an attacker controlled field with a zero length value to trigger a bounded heap over read. This condition occurs before MMS session establishment, a crafted TCP/102 connection attempt can trigger the issue. The resulting over read causes the process to terminate, leading to a denial of service condition.

Details

CVSS Score
7.5
EPSS Score
0.28%

20.2th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Jul 30, 2026
Last Modified
Jul 30, 2026
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