Prosys OPC UA Simulation Server version prior to v5.3.0-64 and UA Modbus Server versions 1.4.18-5 and prior do not sufficiently protect credentials, which could allow an attacker to obtain user credentials and gain access to system data.
https://www.prosysopc.com/blog/#Security
https://www.cisa.gov/uscert/ics/advisories/icsa-22-349-01
Source: Mitre, NVD
Published: 2023-01-03
Updated: 2026-06-17
Base Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N
Severity: High
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.00089