Back to Database
Status published
Critical
CVE-2020-24675
Weak Authentication in Symphony Plus
Vulnerability Description
In S+ Operations and S+ History, it is possible that an unauthenticated user could inject values to the Operations History server (or standalone S+ History server) and ultimately write values to the controlled process.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2020-24675
Credits & Attribution
No credits recorded in the NVD database.
References
More from ABB
View All →CVE-2025-9970
Application credential stored in clear text in memory
Medium
5.7
CVE-2025-9574
Missing Authentication Vulnerability
Critical
9.9
CVE-2025-8754
ABB AbilityTM zenon Remote Transport Vulnerability
High
8.7
CVE-2025-7745
Modbus TCP buffer overread
Medium
6.9
CVE-2025-7705
Authentication bypass due to compatibility mode enabled by default
High
8.6
Affected Vendor
Affected Software
ABB Ability™ Symphony® Plus Operations, ABB Ability™ Symphony® Plus Historian
Vulnerable Versions:
unspecified
Timeline
Official Publish:
December 22nd, 2020
Last Modified:
September 16th, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H