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CVE-2020-24675
Weak Authentication in Symphony Plus
Critical9.8EPSS 1.2%
- Published
- Updated
- Reserved
- Assigned by
- ABB
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.
Timeline
ID reserved
By ABB
- 4 months later
· 4 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ABBCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.2% · top 31% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
ABB · ABB Ability™ Symphony® Plus Operations
- affected unspecified – < 3.3 Service Pack 1
- affected unspecified – < 2.1 SP2 Rollup 2
- affected unspecified – < 2.2
ABB · ABB Ability™ Symphony® Plus Historian
- affected unspecified – < 3.2
References (2)
- https://search.abb.com/library/Download.aspx?DocumentID=2PAA123980&LanguageCode=en&DocumentPartId=&Action=Launch (opens in a new tab)x_refsource_MISCx_transferred
- https://search.abb.com/library/Download.aspx?DocumentID=2PAA123982&LanguageCode=en&DocumentPartId=&Action=Launch (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-24675)Record last updated .