What’s Vulnerable › Vulnerabilities

CVE-2026-66360: MZ Automation libiec61850 Out-of-bounds Read

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-30 · updated 2026-10-23
• Weakness: CWE-125

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.

Affected products

• mz-automation libiec61850: before 1.6.2 — fixed in 1.6.2

How to fix

Upgrade to a fixed version: mz-automation libiec61850 1.6.2. Check the vendor advisory for mitigations.

References

• https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-10.json
• https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-10

Get alerted when CVE-2026-66360 or the next vulnerability affects your stack