PT-2026-66626 · Mz Automation Gmbh · Libiec61850

Arun Babu · CVE-2026-66360 · Published 2026-07-30 · Updated 2026-07-30

Mitre

CVSS v3.1

7.5

High

Base vector

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

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.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-66360

Affected Products

Libiec61850

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-66360 · Security Note
• https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-10.json · Note
• https://cisa.gov/news-events/ics-advisories/icsa-26-211-10 · Note