What’s Vulnerable › Vulnerabilities

CVE-2020-24675: Weak Authentication in Symphony Plus

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-12-22 · updated 2026-06-17
• Weakness: CWE-287

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.

Affected products

• ABB Symphony + Historian: 3.0, 3.1
• ABB Symphony + Operations: 1.1, 2.0, 2.1-sp1, 2.1-sp2, 3.0, 3.1 (+2)

References

• https://search.abb.com/library/Download.aspx?DocumentID=2PAA123980&LanguageCode=en&DocumentPartId=&Action=Launch
• https://search.abb.com/library/Download.aspx?DocumentID=2PAA123982&LanguageCode=en&DocumentPartId=&Action=Launch
• https://search.abb.com/library/Download.aspx?DocumentID=2PAA123980&LanguageCode=en&DocumentPartId=&Action=Launch
• https://search.abb.com/library/Download.aspx?DocumentID=2PAA123982&LanguageCode=en&DocumentPartId=&Action=Launch

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