PT-2026-66624 · Mz Automation Gmbh · Libiec61850

Arun Babu · CVE-2026-65421 · Published 2026-07-30 · Updated 2026-07-30

Mitre

CVSS v3.1

6.5

Medium

Base vector

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

The MMS BER decoder contains a flaw in decoding fixed-width BER fields (boolean/integer): an attacker-supplied length value is not validated, causing a read past the end of a heap buffer. This leads to termination of the MMS service process and a denial-of-service condition.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-65421

Affected Products

Libiec61850

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-65421 · 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