What’s Vulnerable › Vulnerabilities

CVE-2023-32172: Unified Automation UaGateway OPC UA Server Use-After-Free Denial-of-Service Vulnerability

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-03 · updated 2026-06-17
• Weakness: CWE-416

Description

Unified Automation UaGateway OPC UA Server Use-After-Free Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation UaGateway. Authentication is required to exploit this vulnerability. The specific flaw exists within the implementation of the ImportXML function. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20497.

Affected products

• Unified Automation UaGateway: before 1.5.13.487 — fixed in 1.5.13.487

How to fix

Upgrade to a fixed version: Unified Automation UaGateway 1.5.13.487. Check the vendor advisory for mitigations.

References

• https://documentation.unified-automation.com/uagateway/1.5.14/CHANGELOG.txt
• https://www.zerodayinitiative.com/advisories/ZDI-23-777/
• https://documentation.unified-automation.com/uagateway/1.5.14/CHANGELOG.txt
• https://www.zerodayinitiative.com/advisories/ZDI-23-777/

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