CVE-2026-66360
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductMz Automation Gmbh Libiec61850
PublishedJul 30, 2026
First seenJul 30, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- MZ Automation GmbH libiec618501.6.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| MZ Automation GmbH libiec61850 | v < 1.6.2 | 1.6.2 |
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