Heap Overflow Vulnerability in ISO Presentation Layer by Vendor Ignition
CVE-2026-66360

8.7HIGH

Key Information:

Vendor

Mz Automation Gmbh

Status
Libiec61850
Vendor
CVE Published:
30 July 2026

What is CVE-2026-66360?

A vulnerability in the ISO Presentation layer of Ignition allows attackers to exploit improper handling of parameters during normal mode negotiation. Specifically, a missing length check when processing encoded presentation data enables a zero-length field to cause a bounded heap over read. This issue can be triggered before the establishment of an MMS session through a crafted TCP/102 connection attempt. The resulting over read leads to process termination and consequently causes a denial of service.

Affected Version(s)

libiec61850 0 < 1.6.2

libiec61850 1.6.2

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-2...
https://github.com/cisagov/CSAF/blob/develop/csaf_files/O...

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Arun Babu of Central Power Research Institute reported this vulnerability to CISA.
.