# CVE-2020-24683

## Summary

- **CVE ID:** CVE-2020-24683
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-602, CWE-305
- **Published:** Dec 22, 2020
- **Last Modified:** Mar 14, 2026

## Description

The affected versions of S+ Operations (version 2.1 SP1 and earlier) used an approach for user authentication which relies on validation at the client node (client-side authentication). This is not as secure as having the server validate a client application before allowing a connection. Therefore, if the network communication or endpoints for these applications are not protected, unauthorized actors can bypass authentication and make unauthorized connections to the server application.

## Affected Products

- ABB — ABB Ability™ Symphony® Plus Operations (unspecified)

## References

- [CNA](https://search.abb.com/library/Download.aspx?DocumentID=2PAA123980&LanguageCode=en&DocumentPartId=&Action=Launch)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.45%
- **EPSS Percentile:** 63.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-19._