CVE-2020-27299: Honeywell Opc Ua Tunneller

Critical severity, CVSS 9.1. EPSS: 1.7% chance of exploitation in the next 30 days.

The affected product is vulnerable to an out-of-bounds read, which may allow an attacker to obtain and disclose sensitive data information or cause the device to crash on the OPC UA Tunneller (versions prior to 6.3.0.8233).

Affected products

• Honeywell Opc Ua Tunneller: before 6.3.0.8233 (fixed in 6.3.0.8233)

Published 2021-01-26. Last modified 2026-06-17.